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 Awesome Common Lisp !Awesome (https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg) (https://github.com/sindresorhus/awesome) !Assertible status 
 (https://assertible.com/apis/102e334d-f9a8-4565-9353-7572de775cae/status?api_token=8b55a286830323effb) (https://assertible.com/docs/guide/deployments)
A curated list of _awesome_ Common Lisp libraries.
For awesome software, see lisp-lang.org's success stories (http://lisp-lang.org/success/) and the awesome-cl-software (https://github.com/azzamsa/awesome-cl-software) list.
All libraries listed here are available from Quicklisp 16 unless
stated otherwise. The ones marked with a ⭐ are so widespread and
solid that they became community standards. You can't be wrong with
them. This is the case for Quicklisp, BordeauxThreads and
such. Libraries denoted with a 👍 are the ones we like and want to
promote here at the Awesome-cl list. They proved solid, they may solve
a problem better than a community standard but they aren't as
widespread, or not considered as stable. For example, we prefer
Spinneret over Cl-Who.
Add something new! See the contributing (#contributing) section for adding something to the
list.
This is released under the GNU Free Documentation License - its text
is provided in the LICENSE file. This repository is also mirrored on
NotABug (https://notabug.org/CodyReichert/awesome-cl) - a fully-free (as in libre)
alternative to Github. Preference is given to free software 13 and
sellers who aren't evil for physical resources.
Table of Contents
- Audio (#audio)
- Build Systems (#build-systems)
- Compilers, code generators (#compilers-code-generators)
- **APL** (#apl) 
- **C, C++** (#c-c)
- Cryptography (#cryptography)
- Cryptocurrencies (#cryptocurrencies)
- Database (#database)
- **ORMs** (#orms) 
- **Persistent object databases** (#persistent-object-databases)
- **Graph databases** (#graph-databases) 
- **Wrappers** (#wrappers) 
- **Migration tools** (#migration-tools) 
- **To third parties** (#to-third-parties) 
- **Tools** (#tools) 
- Data Structures (#data-structures)
- Docker images (#docker-images)
- Foreign Function Interface, languages interop (#foreign-function-interface-languages-interop)
- **C** (#c) 
- **Clojure** (#clojure) 
- **Erlang** (#erlang) 
- **Java** (#java) 
- **Objective-C** (#objective-c) 
- **Python** (#python) 
- **.Net Core** (#net-core) 
- **Miscellaneous** (#miscellaneous)
- Game Development (#game-development)
- Graphics (#graphics)
- GUI (#gui)
- **Mobile** (#mobile)
- Implementations (#implementations)
- JSON (#json)
- YAML (#yaml)
- Language extensions (#language-extensions)
- **Portability layers** (#portability-layers) 
- **Changing the syntax** (#changing-the-syntax) 
- **CLOS extensions** (#clos-extensions) 
- **Function extensions** (#function-extensions) 
- **Iteration** (#iteration) 
- **Lambda shorthands** (#lambda-shorthands) 
- **Non-deterministic, logic programming** (#non-deterministic-logic-programming)
- **Reactive programming** (#reactive-programming) 
- **Contract programming** (#contract-programming) 
- **Typing** (#typing) 
- **Theorem provers** (#theorem-provers) 
- Learning and Tutorials (#learning-and-tutorials)
- **Online** (#online) 
- **Beginner** (#beginner) 
- **Intermediate** (#intermediate) 
- **Advanced** (#advanced) 
- **Coding platforms** (#coding-platforms)
- **Web Development** (#web-development) 
- **Reference** (#reference) 
- **Offline** (#offline) 
- **Beginner** (#beginner-1) 
- **Intermediate** (#intermediate-1) 
- **Advanced** (#advanced-1) 
- **Other books** (#other-books) 
- **Community** (#community) 
- Library Manager (#library-manager)
- **Interfaces to other package managers** (#interfaces-to-other-package-managers)
- Machine Learning (#machine-learning)
- Natural Language Processing (#natural-language-processing)
- Network and Internet (#network-and-internet)
- **HTTP clients** (#http-clients) 
- **HTTP Servers** (#http-servers) 
 - **Hunchentoot plugins** (#hunchentoot-plugins) 
 - **Clack plugins** (#clack-plugins) 
- **Web frameworks** (#web-frameworks) 
 - **Isomorphic web frameworks** (#isomorphic-web-frameworks) 
- **Parsing html** (#parsing-html) 
- **Querying HTML/DOM, web scraping** (#querying-htmldom-web-scraping) 
- **HTML generators and templates** (#html-generators-and-templates) 
- **URI handling** (#uri-handling) 
- **Javascript** (#javascript) 
- **Deployment** (#deployment) 
- **Monitoring** (#monitoring) 
- **Websockets** (#websockets) 
- **Web development utilities** (#web-development-utilities) 
 - **Assets management** (#assets-management) 
 - **Browser tests** (#browser-tests) 
 - **Form handling** (#form-handling) 
 - **User login and password management** (#user-login-and-password-management) 
 - **Web project skeletons and generators** (#web-project-skeletons-and-generators)
- **Others** (#others) 
 - **Email** (#email) 
 - **OpenAPI, OData, OpenRPC** (#openapi-odata-openrpc) 
 - **Static site generators** (#static-site-generators) 
 - **Third-party APIs** (#third-party-apis) 
- Numerical and Scientific (#numerical-and-scientific)
- **Matrix libraries** (#matrix-libraries)
- **Statistics** (#statistics) 
- **Units** (#units) 
- **Utils** (#utils) 
- Parallelism and Concurrency (#parallelism-and-concurrency)
- **Actors pattern** (#actors-pattern) 
- **Event processing** (#event-processing)
- **Job processing** (#job-processing) 
- Regex (#regex)
- Scripting (#scripting)
- **Writing, running scripts** (#writing-running-scripts) 
- **Command-line options parsers** (#command-line-options-parsers) 
- **Readline, ncurses and other graphical helpers** (#readline-ncurses-and-other-graphical-helpers)
- **Shells, shells interfaces** (#shells-shells-interfaces) 
- **System administration** (#system-administration) 
- **Other scripting utilities** (#other-scripting-utilities) 
- Text Editor Resources (#text-editor-resources)
- **Emacs** (#emacs) 
- **Vim & Neovim** (#vim--neovim) 
- **Eclipse** (#eclipse) 
- **Lem** (#lem) 
- **Atom, Pulsar** (#atom-pulsar) 
- **Sublime Text** (#sublime-text) 
- **VSCode** (#vscode) 
- **JetBrains** (#jetbrains) 
- **Geany (experimental)** (#geany-experimental)
- **Notebooks** (#notebooks) 
- **REPLs** (#repls) 
- **Online editors** (#online-editors) 
- **Apps** (#apps) 
- Text and binary parsers (#text-and-binary-parsers)
- Text Processing (#text-processing)
- Tools (#tools-1)
- Unit Testing (#unit-testing)
- Utilities (#utilities)
- **Caching** (#caching) 
- **Compression / decompression** (#compression--decompression)
- **Configuration** (#configuration) 
- **CSV** (#csv) 
- **Date and time** (#date-and-time) 
- **Data validation** (#data-validation) 
- **Developer utilities** (#developer-utilities) 
- **Documentation builders** (#documentation-builders) 
- **Files and directories** (#files-and-directories) 
- **Git** (#git) 
- **i18n** (#i18n) 
- **Linting, code formatting** (#linting-code-formatting) 
- **Literate programming** (#literate-programming) 
- **Logging** (#logging) 
- **Macro helpers** (#macro-helpers) 
- **Markdown** (#markdown) 
- **PDF** (#pdf) 
- **Plotting** (#plotting) 
- **Project skeletons** (#project-skeletons) 
- **Security** (#security) 
- **System interface** (#system-interface) 
- **XML** (#xml) 
- **Other** (#other) 
- Contributing (#contributing)
Audio
=====
Music composition:
⟡ OM7 (https://github.com/openmusic-project/om7) - a new implementation of the OpenMusic visual programming and computer-aided composition environment including a number of improvements on graphical interface, computational mode, and 
connection to external software libraries. GPL3 2 .
  ⟡ an extension: rq (https://github.com/openmusic-project/RQ) - a library for rhythm transcription in OpenMusic (version 6.10 and later). demo video (https://www.youtube.com/watch?v=XVEllB0TtVs). GPL3 2 .
⟡ Incudine (http://incudine.sourceforge.net/) - Music/DSP programming environment for Common Lisp. Useful to design software synthesizers or sound plugins from scratch. It is also a compositional tool that allows to produce high 
quality sounds controllable at the sample level, defining and redefining the digital signal processors and the musical structures on-the-fly.
⟡ CLM (https://ccrma.stanford.edu/software/clm/) - Common Lisp Music is a music synthesis and signal processing package in the Music V family. It provides much the same functionality as Stk, Csound, SuperCollider, PD, CMix, cmusic, and 
Arctic — a collection of functions that create and manipulate sounds, aimed primarily at composers (in CLM's case anyway).
  ⟡ common-tones (https://github.com/theraphonics/common-tones) - a fork of CLM5 with modern Lisp (ASDF, cffi…). BSD_3Clause 15 .
⟡ Slippery Chicken (https://github.com/mdedwards/slippery-chicken/) - Algorithmic composition library which outputs Midi, Common Music Notation, pdf-score via Lilypond and sound via Common Lisp Music. GPL3 2 .
  ⟡ with documentation: https://michael-edwards.org/sc/
⟡ Common Music (https://github.com/ormf/cm) - the repository of an
 ancient version of Common Music (version 2.12.0), the presumably
 last version which ran on Common Lisp dating from around 2007-09,
 before work on Common Music shifted to (scheme-based) cm3.
  ⟡ note: old project but working.
  ⟡ cm-incudine (https://github.com/ormf/cm-incudine) - extends Common Music 2 with realtime capabilities. GPL2.
⟡ cl-patterns (https://github.com/defaultxr/cl-patterns) - a system for composing music via Lisp code, heavily inspired by SuperCollider’s patterns system, with aims to implement much of it, but in a more robust, expressive, consistent,
reflective, and lispy way. Audio output through SuperCollider, with preliminary support for Incudine, and MIDI through ALSA.
⟡ Music (https://github.com/MegaLoler/Music) - A framework for musical expression in Lisp with a focus on music theory (built from scratch, unrelated to Common Music).
Decoders, sound processing:
⟡ Harmony (https://shirakumo.github.io/harmony) - A real-time sound processing and playback system. zlib 33 .
  ⟡ "provides you with audio processing tools as well as an audio server to play back music, sfx, and so forth."
  ⟡ using cl-mixed (https://github.com/Shirakumo/cl-mixed) for the mixing and sound processing library.
⟡ easy-audio (https://github.com/shamazmazum/easy-audio) - a collection of audio decoders and metadata readers.
others:
⟡ scheduler (https://github.com/byulparan/scheduler) - The time based musical event scheduler for Common Lisp. Apache2.0 89 .
⟡ Common Music Notation (https://ccrma.stanford.edu/software/cmn/) - Common Music Notation (CMN) provides a package of functions to hierarchically describe a musical score. Public domain.
⟡ osc (https://github.com/zzkt/osc) - an implementation of the Open Sound Protocol. LGPL2.1 11 .
bindings and clients to other software and libraries:
⟡ cl-mpg123 (https://github.com/Shirakumo/cl-mpg123), cl-opus (https://github.com/Shirakumo/cl-opus) (OGG/Opus), cl-vorbis (https://github.com/Shirakumo/cl-vorbis) (OGG/Vorbis), cl-SoLoud (https://github.com/Shirakumo/cl-soloud), 
cl-out123 (https://github.com/Shirakumo/cl-out123) (libout123), cl-flac (https://github.com/Shirakumo/cl-flac)
⟡ csound (https://github.com/csound/csound) - A sound and music computing system. Includes CFFI and FFI interfaces for Common Lisp.
⟡ cl-collider (https://github.com/byulparan/cl-collider) - A SuperCollider (http://supercollider.github.io/) client for CommonLisp. With a tutorial (https://github.com/defaultxr/cl-collider-tutorial) and live coding demos 
(https://www.youtube.com/watch?v=xzTH_ZqaFKI). Public domain.
⟡ cl-openal (https://github.com/zkat/cl-openal) - bindings for the OpenAL audio library. Public domain.
and more audio software targetting musicians on awesome-cl-software#audio (https://github.com/CodyReichert/awesome-cl#audio) (Opus Modus, OpenMusic…).
Build Systems
=============
⟡ ⭐ASDF (https://common-lisp.net/project/asdf/) - Another System Definition Facility; a build system for Common Lisp. Expat 14 . Quicklisp (see library manager (#library-manager)) uses ASDF under the hood.
  ⟡ known ASDF extensions (https://common-lisp.net/project/asdf/#extensions), such as asdf-system-connections, that lets you specify systems that are automatically loaded when two other systems are loaded, to connect them.
⟡ asdf-linguist (https://github.com/eudoxia0/asdf-linguist) - Extensions for ASDF. Expat 14 .
⟡ asdf-viz (https://github.com/guicho271828/asdf-viz) - a tool to visualize the library dependencies of ASDF systems, the call graph of a function and the class inheritances. LLGPL 8 .
See also:
⟡ modularize (https://github.com/Shinmera/modularize) - A modularization framework for Common Lisp. zlib 33 .
  ⟡ provides a common interface to segregate major application components.
  ⟡ for instance, by adding module definition options you can introduce mechanisms to tie modules together in functionality, hook into each other and so on.
  ⟡ acts as a wrapper around defpackage and integrates into ASDF.
Compilers, code generators
==========================
APL
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ April (https://github.com/phantomics/april) - The APL programming language (a subset thereof) compiling to Common Lisp. Replace hundreds of lines of number-crunching code with a single line of APL. Apache2 89 .
C, C++
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ cmacro (https://github.com/eudoxia0/cmacro) - Lisp macros for C. MIT 200 .
⟡ C-mera (https://github.com/kiselgra/c-mera) - a source-to-source compiler that utilizes Lisp's macro system for meta programming of C-like languages. GPL3 2 .
⟡ lispc (https://github.com/eratosthenesia/lispc) - a powerful "lispsy" macrolanguage for C. MIT 200 .
⟡ with-c-syntax (https://github.com/y2q-actionman/with-c-syntax) - a fun package which introduces the C language syntax into Common Lisp. (Yes, this package is not for practical coding, I think.) WTFPL Licence.
⟡ ecrepl (https://gitlab.common-lisp.net/ecl/ecrepl) - an interactive REPL for the C language. BSD_2Clause 17 .
⟡ Software-Evolution-Library (https://github.com/GrammaTech/sel) - The SEL enables the programmatic modification and evaluation of software (C/C++ support using Clang, compiled assembler, and linked ELF binaries). GPL3 2 .
⟡ vacietis (https://github.com/vsedach/Vacietis) - C to Common Lisp compiler. LGPL3 9 .
Cryptography
============
⟡ ⭐ Ironclad (https://github.com/sharplispers/ironclad) - A library of crypto functions for Common Lisp. Not considered secure, but is still useful for the message digest functions. Expat 14 .
⟡ crypto-shortcuts (https://github.com/Shinmera/crypto-shortcuts) - Collection of common crypto shortcuts. zlib 33 .
⟡ trivial-ssh (https://github.com/eudoxia0/trivial-ssh) - An SSH client library. Expat 14 .
⟡ cl-ssh-keys (https://github.com/dnaeon/cl-ssh-keys) - Common Lisp system for generating and parsing of OpenSSH keys. BSD_3Clause 15 .
⟡ cl-bcrypt (https://github.com/dnaeon/cl-bcrypt) - Common Lisp system for parsing and generating bcrypt password hashes. BSD_3Clause 15 .
  ⟡ see also cl-pass (https://github.com/eudoxia0/cl-pass), using pbkdf2.
⟡ gpgme (https://www.gnupg.org/download/index.en.html#gpgme) (GnuPG Made Easy) is the standard library to access GnuPG functions from programming languages. It provides an official Common Lisp system.
  ⟡ gpgme lisp sources (https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gpgme.git;a=tree;f=lang/cl;h=05151bdf839e513f534a1b423d59332a2e46fd5d;hb=HEAD) (not in Quicklisp). GPL2.
⟡ cl-frugal-uuid (https://github.com/ak-coram/cl-frugal-uuid/) - Common Lisp UUID library with zero dependencies. MIT 200 .
Cryptocurrencies
================
⟡ bitcoin-rpc (https://codeberg.org/kilianmh/bitcoin-rpc/) - a (hopefully) complete Bitcoin RPC client. AGPL-3.0 89 
⟡ bp (https://github.com/rodentrabies/bp) - Bitcoin Protocol components in Common Lisp. MIT 200 .
⟡ cl-monero-tools (https://github.com/glv2/cl-monero-tools) - Common Lisp toolbox to work with the Monero cryptocurrency. GPL3 2 . Not in Quicklisp.
⟡ peercoin-blockchain-parser (https://github.com/glv2/peercoin-blockchain-parser) - parse the blockchain contained in a file and export some of its data to a text file, a SQL script or a database. It can also create a database using the
RPC of a Peercoin daemon as source of data instead of a blockchain file. LGPL3. Not in Quicklisp.
⟡ peercoin-calculator (https://github.com/glv2/peercoin-calculator) - This program gives you the probability of generating a POS or POW block within 10 minutes, 24 hours, 31 days, 90 days and 1 year, as well as the reward that can be 
expected. GUI in Qt. GPL3 2 . Not in Quicklisp.
⟡ peercoin-vote (https://github.com/glv2/peercoin-vote) - A voting system based on data from the blockchain (addresses and balances). GPL3 2 . Not in Quicklisp.
⟡ stacks-api (https://github.com/kilianmh/stacks-api) - a Stacks API client. AGPL-3.0 89 
See also legochain (https://github.com/defunkydrummer/legochain), a simple educational blockchain; emotiq (https://github.com/emotiq/emotiq), a next-generation blockchain with an innovative natural-language approach to smart contracts 
built in Common Lisp (stopped).
Database
========
⟡ NEW endatabas (https://github.com/endatabas/endb) - Schemaless SQL document database with full history. AGPL-3.0 89 .
 - built in Common Lisp and Rust.
 - in development, alpha product scheduled for Q2 of 2024. roadmap (https://docs.endatabas.com/appendix/roadmap.html).
⟡ cl-yesql (https://github.com/ruricolist/cl-yesql) - SQL statements live in their own files, in SQL syntax, and are imported into Lisp as functions. You are not limited to the features a DSL supports. Based on Clojure's Yesql. MIT 200 
.
ORMs
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ ⭐ clsql (http://www.cliki.net/CLSQL) - An SQL database with a Common Lisp interface. LLGPL 8 .
⟡ 👍 mito (https://github.com/fukamachi/mito) - An ORM for Common Lisp with migrations, relationships and PostgreSQL support LLGPL 8 .
  ⟡ mitho-auth (https://github.com/fukamachi/mito-auth), a mixin class for use authorization
  ⟡ mito-attachment (https://github.com/fukamachi/mito-attachment), a mixin class for file management outside of RDBMS.
⟡ cl-dbi (https://github.com/fukamachi/cl-dbi) - A database-independent interface for Common Lisp. LLGPL 8 .
  ⟡ dbd-oracle (https://github.com/sergadin/dbd-oracle) - an Oracle database driver for CL-DBI. LLGPL 8 .
⟡ crane (https://github.com/eudoxia0/crane) - Another ORM. Expat 14 .
⟡ datafly (https://github.com/fukamachi/datafly) - A lightweight database library. 3-clause BSD 15 .
⟡ sxql (https://github.com/fukamachi/sxql) - A DSL for generating SQL. 3-clause BSD 15 .
Persistent object databases
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ bknr.datastore (https://github.com/hanshuebner/bknr-datastore) - a CLOS-based lisp-only database in RAM with transaction logging persistence. Manual (https://www.common-lisp.net/project/bknr/html/documentation.html). licence 208 .
  ⟡ see also this good introductory blog post (https://ashok-khanna.medium.com/persistent-in-memory-data-storage-in-common-lisp-b-k-n-r-37f8ae76042f)
  ⟡ an example web application using bknr.datastore: screenshotbot-oss (https://github.com/screenshotbot/screenshotbot-oss).
  ⟡ See also bknr.cluster (https://github.com/tdrhq/bknr.cluster), if you want a highly-available replicated version of bknr.datastore.
⟡ ubiquitous (https://github.com/Shinmera/ubiquitous) - A library providing easy-to-use persistent configuration storage. zlib 33 .
⟡ cl-prevalence (https://common-lisp.net/project/cl-prevalence/) - in-memory database system. Implementation of Object Prevalence, in which business objects are kept live in memory and transactions are journaled for system recovery. 
github fork (https://github.com/40ants/cl-prevalence). LLGPL 8 .
  ⟡ See also cl-prevalence-multimaster (https://github.com/40ants/cl-prevalence-multimaster), to syncronize multiple cl-prevalence systems state.
⟡ cl-naive-store (https://gitlab.com/Harag/cl-naive-store) - a naive persisted, in memory (lazy loading), indexed, document store for Common Lisp. MIT 200 .
 - see the introductory blog post (https://zaries.wordpress.com/2022/05/31/cl-naive-store/)
 - dare we add: used in production by the author's company (ASTN Group, see awesome-lisp-companies)
See also Clache (https://github.com/html/clache), that can save any object on disk.
Graph databases
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ AllegroGraph (https://allegrograph.com/) - a high-performance, multi-model (document and graph), entity-event knowledge graph technology.
  ⟡ Proprietary, with a free version of a limit of 5 million RDF triples.
  ⟡ with a hosted version (https://allegrograph.cloud/)
  ⟡ AllegroGraph 8.0 (released December, 2023) "incorporates Large Language Model (LLM) components directly into SPARQL along with vector generation and vector storage for a comprehensive AI Knowledge Graph solution."
⟡ cl-agraph (https://github.com/vseloved/cl-agraph), a minimal client for AllegroGraph.
⟡ neo4cl (https://codeberg.org/Equill/neo4cl) - a library for interacting with Neo4J. Sends Cypher queries to a Neo4J server, and decodes the responses into something useful for processing in CL. Apache2 89 .
  ⟡ and maybe: cl-neo4j (https://github.com/kraison/cl-neo4j) - a thin neo4j RESTFUL client interface.
⟡ vivace-graph (https://github.com/kraison/vivace-graph-v3) - graph database & Prolog implementation. Takes design inspiration from CouchDB, neo4j and AllegroGraph. It implements an ACID-compliant object graph model with user-defined 
indexes and map-reduce views. It also implements a master / slave replication scheme for redundancy and horizontal read scaling. Querying the graph is accomplished via a number of Lisp methods or via a Prolog-like query language. MIT 
200 .
  ⟡ "I have used Vivace Graph as an online catalog for millions of products, as the back end for a complex, adaptable VoIP-based IVR, as well as data store for several complex big data analysis systems, and finally as the engine for two
recommender systems." (issue #23)
  ⟡ "Why is vivace graph so fast? I have been comparing it with SQL-based approach and Neo4j, and vivace graph is much, much faster."
and also:
⟡ restagraph (https://codeberg.org/Equill/restagraph) - an app that dynamically generates REST APIs for a Neo4j database, using a schema defined within the database. GPL3 2 .
Wrappers
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ ⭐ postmodern (http://marijnhaverbeke.nl/postmodern/) - A library for interacting with PostgreSQL. zlib 33 .
⟡ cl-sqlite (https://github.com/dmitryvk/cl-sqlite) - Bindings for SQLite. Public domain.
⟡ cl-memcached (https://github.com/quasi/cl-memcached) - Fast, thread-safe interface to the Memcached object caching system. Expat 14 .
⟡ cl-mongo (https://github.com/fons/cl-mongo) - MongoDB client. Expat 14 .
⟡ cl-redis (https://github.com/vseloved/cl-redis) - Redis client. Expat 14 .
⟡ cl-disque (https://github.com/CodyReichert/cl-disque) - Disque client. 3-clause BSD 15 .
⟡ cl-rethinkdb (https://github.com/orthecreedence/cl-rethinkdb) - RethinkDB client. Expat 14 .
⟡ cl-mango (https://github.com/cmoore/cl-mango/) - A minimalist CouchDB 2.x database client. BSD_3Clause.
  ⟡ See also clouchdb (https://common-lisp.net/project/clouchdb/) - Library for interacting with CouchDB. FreeBSD 39 .
⟡ lmdb (https://github.com/antimer/lmdb) - Bindings to LMDB (http://www.lmdb.tech/doc/), the Lightning Memory-mapped Database, an ACID key-value database with MultiVersion Concurrency Control.
⟡ cl-ndbapi (https://github.com/datagraph/cl-ndbapi) - bindings to the C++ NDB API of RonDB (https://www.rondb.com/), "the world's fastest key value store", by Dydra (https://dydra.com/home). GPLv2.
⟡ cl-duckdb (https://github.com/ak-coram/cl-duckdb) - Common Lisp CFFI wrapper around the DuckDB C API. MIT 200 .
Migration tools
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ cl-migratum (https://github.com/dnaeon/cl-migratum) - a system which provides facilities for performing database schema migrations, designed to work with various databases. BSD_3Clause 15 .
⟡ postmodern-passenger-pigeon (https://github.com/fisxoj/postmodern-passenger-pigeon/) - a migration manager for postmodern. No licence specified.
To third parties
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ dyna (https://github.com/Rudolph-Miller/dyna) - an AWS DynamoDB ORM. MIT 200 .
⟡ cl-influxdb (https://github.com/mmaul/cl-influxdb/) - an interface to the Time Series Database InfluxDB. MIT 200 .
⟡ pzmq (https://github.com/orivej/pzmq) - ZeroMQ 4.0+ Common Lisp bindings. Unlicense.
Tools
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ ⭐ pgloader (https://github.com/dimitri/pgloader) - a data loading tool for PostgreSQL. PostgreSQL Licence 205 .
Data Structures
===============
⟡ 👍 str (https://github.com/vindarel/cl-str) - a modern, simple and consistent string manipulation library. MIT 200 .
⟡ 👍 FSet (https://common-lisp.net/project/fset) - A functional, set-theoretic collections data structure library. LLGPL 8 .
⟡ trivial-extensible-sequences (https://github.com/Shinmera/trivial-extensible-sequences) - Portability library for the extensible sequences protocol (SBCL documentation (http://www.sbcl.org/manual/#Extensible-Sequences)). zlib 33 .
⟡ bst (https://github.com/glv2/bst) - Binary Search Tree. GPL3 2 .
⟡ pileup (http://nikodemus.github.io/pileup/) - a portable, performant, and thread-safe binary heap for Common Lisp. MIT 200 .
⟡ sycamore (https://github.com/ndantam/sycamore) - a fast, purely functional data structure library. BSD_3Clause 15 .
⟡ genhash (https://github.com/pnathan/genhash) – hash table implementation with API from generic methods. Public domain.
⟡ cl-ctrie (https://github.com/danlentz/cl-ctrie) -
lock-free, concurrent, key/value index with efficient memory-mapped persistence and fast transient storage models. MIT 200 .
⟡ cl-data-structures (https://github.com/sirherrbatka/cl-data-structures) - a portable collection of data structures and algorithms (mainly dicts and sequences, with some statistical functions). BSD 15 .
⟡ listopia (https://github.com/Dimercel/listopia) - a list manipulation library inspired by Haskell's Data.List. LLGPL 8 .
⟡ hash-set (https://github.com/samebchase/hash-set/) - a convenience library implementing hash sets on top of CL hash tables The Unlicense 5 
⟡ bit-smasher (https://github.com/thephoeron/bit-smasher) - Common Lisp library for handling bit vectors, bit vector arithmetic, and type conversions. MIT 200 .
⟡ cl-containers (https://common-lisp.net/project/cl-containers/) - an extensive library of data structures and utilities - queues, trees, heaps, doubly-linked lists, sets, bags,... MIT 200 
⟡ cl-competitive (https://github.com/privet-kitty/cl-competitive) - Common Lisp algorithms collection for competitive programming. Public domain, CCO or MIT.
⟡ nonempty (https://github.com/fosskers/cl-nonempty) - Non-empty collections for Common Lisp. LGPL3 9 .
Accessing data structures:
⟡ 👍 access (https://github.com/AccelerationNet/access/) - Consistent and nested access to most common data structures. BSD_3Clause 15 .
⟡ modf (https://github.com/smithzvk/modf) - a setf-like macro for functional programming.
Other data structures:
⟡ bitfield (https://github.com/marcoheisig/bitfield) - Efficiently represent several finite sets or small integers as a single non-negative integer. MIT 200 .
Docker images
=============
⟡ cl-docker-images (https://common-lisp.net/project/cl-docker-images/) - Docker images for ABCL, CCL, ECL, and SBCL on Windows (amd64) and Alpine and Debian (amd64, arm64, arm/v7) BSD_2Clause 17 .
⟡ base-lisp-image (https://github.com/40ants/base-lisp-image) - base
 Docker image for Common Lisp projects with SBCL or CCL and the latest
 ASDF, Qlot and Roswell.
⟡ archlinux-cl (https://github.com/yitzchak/archlinux-cl) - Docker Arch Linux image with Common Lisp implementations (7 to this day). MIT.
Foreign Function Interface, languages interop
=============================================
C ##
⟡ ⭐ CFFI (https://github.com/cffi/cffi) - Portable, easy-to-use C foreign function interface. Expat 14 .
  ⟡ cffi-ops (https://github.com/bohonghuang/cffi-ops) - helps write concise CFFI-related code.
  ⟡ cffi-objects (https://github.com/bohonghuang/cffi-object) - enables fast and convenient interoperation with foreign objects.
⟡ 👍cl-autowrap (https://github.com/rpav/cl-autowrap) - Automatically parses header files into CFFI definitions. FreeBSD 39 .
⟡ cl-bindgen (https://github.com/sdilts/cl-bindgen) - A command line tool and library for creating Common Lisp language bindings from C header files. MIT 200 .
⟡ cl-gobject-introspection (https://github.com/andy128k/cl-gobject-introspection) - Gobject Introspection (https://gi.readthedocs.io/en/latest/) FFI. Automatic bindings to call into the C library. BSD 15 . Generate a lisp interface with
gir2cl (https://github.com/kat-co/gir2cl). LGPL3 9 .
⟡ cl-cxx-jit (https://github.com/Islam0mar/CL-CXX-JIT) - Common Lisp and C++ interoperation with JIT. MIT 200 .
Clojure
⟡ ABCLJ (https://github.com/lsevero/abclj) - dead easy Clojure to Common lisp interop. EPL-2.0.
In development:
⟡ Cloture (https://github.com/ruricolist/cloture) - Clojure in Common Lisp.
▐ Cloture is in very early (pre-alpha) stages, but it has progressed far enough to load clojure.test, allowing the test suite to actually be written in Clojure.
See also those libraries:
⟡ cl-oju (https://github.com/eigenhombre/cl-oju/) - a few idioms, mostly relating to sequences, that I miss when writing Common Lisp. MIT 200 .
⟡ clj-con (https://github.com/dtenny/clj-con) - Clojure-style concurrency operations in Common Lisp. MIT 200 .
⟡ clj-re (https://github.com/dtenny/clj-re/) - Clojure-style regular expression functions.
Erlang ##
⟡ CLERIC (https://github.com/flambard/CLERIC) - a Common Lisp Erlang Interface. An implementation of the Erlang distribution protocol, comparable with erl_interface and jinterface. MIT 200 .
Java ##
⟡ cl+j (https://common-lisp.net/project/cl-plus-j/) - A JNI-based interface to a JVM via CFFI. Not available on Quicklisp. Does not reliably work with all implementations. Expat 14 .
Objective-C ##
⟡ objc-lisp-bridge (https://github.com/fiddlerwoaroof/objc-lisp-bridge) - A portable reader and bridge for interacting with Objective-C and Cocoa. MIT 200 .
Python ##
⟡ burgled-batteries (https://github.com/pinterface/burgled-batteries) - A bridge between Python and Common Lisp. The goal is that Lisp programs can use Python libraries. Not available on Quicklisp. MIT 200 .
⟡ cl4py (https://github.com/marcoheisig/cl4py) - The library cl4py (pronounce as clappy) allows Python programs to call Common Lisp libraries. MIT 200 .
⟡ py4cl (https://github.com/bendudson/py4cl) - A library that allows Common Lisp code to access Python libraries. It is basically the inverse of cl4py. MIT 200 .
  ⟡ its fork py4cl2 (https://github.com/digikar99/py4cl2), at first less stable, now more developped and faster.
  ⟡ py4cl2-cffi (https://github.com/digikar99/py4cl2-cffi) - CFFI based alternative to py4cl2.
* "When capable, the CFFI approach can be a 50 times faster than py4cl2."
See also async-process (https://github.com/cxxxr/async-process/).
⟡ cl-python (https://github.com/metawilm/cl-python) - an implementation of Python in Common Lisp. LLGPL 8 , not under active development.
.Net Core
⟡ Bike (https://github.com/Lovesan/bike) - a cross-platform .Net Core interface. MIT 200 .
Miscellaneous ##
⟡ Foil (http://foil.sourceforge.net/) - A foreign object interface; works with the JVM and CLI. Not available on Quicklisp. CPL 1.0 47 .
For Emacs Lisp:
⟡ CEDAR (https://gitlab.com/sasanidas/cedar) - an advance interactive development environment aiming to be Emacs compatible with all the features that come with it. (WIP)
⟡ CLOCC's elisp.lisp (https://sourceforge.net/p/clocc/hg/ci/default/tree/src/cllib/elisp.lisp) - Emacs Lisp in Common Lisp.
  ⟡ implementation of the Emacs Lisp language as a Common Lisp package. 1999 
  ⟡ does not attempt to reimplement the library of functions provided in Emacs to manipulate buffers and other related objects, so it focuses on the "pure" Emacs Lisp language; but it was able to run the non-UI parts of the Emacs 
Calendar. (S. Monnier, M. Sperber)
Game Development
================
⟡ Trial (https://github.com/shirakumo/trial) - Trial is an OpenGL game engine with a heavy focus on modularity. It is supposed to provide a large toolkit of useful bits and pieces from which you can create a game. zlib 33 .
  ⟡ the Kandria (https://kandria.com/) game is built with Trial.
⟡ trivial-gamekit (https://borodust.org/projects/trivial-gamekit/getting-started/) – with this small framework you would be able to make simple 2D games: draw basic geometric forms, images and text, play sounds and listen to mouse and 
keyboard input. MIT 200 .
⟡ virality (https://github.com/bufferswap/ViralityEngine) - A component-based game engine written in Common Lisp MIT 200 .
⟡ Xelf (https://gitlab.com/dto/xelf/) - Extensible game library. Not available on Quicklisp. GNU LGPL2.1 11 .
Utilities:
⟡ cl-gamepad (https://shirakumo.github.io/cl-gamepad) - Access to gamepads and joysticks on Windows, Mac OS, and Linux. zlib 33 .
⟡ cl-mpg123 (https://shirakumo.github.io/cl-mpg123) and cl-out123 (https://shirakumo.github.io/cl-out123), bindings libraries for libmpg123 and libout123 respectively, giving you fast and easy to use mp3 decoding and cross-platform 
audio output. zlib 33 .
Graphics
========
These are libraries for working with graphics, rather than making GUIs (i.e. widget toolkits), which have their own section.
⟡ ⭐ Sketch (https://github.com/vydd/sketch) - A CL framework for the creation of electronic art, graphics, and lots more. MIT 200 .
⟡ cl-svg (https://github.com/wmannis/cl-svg) - A basic library for producing SVG files. Expat 14 .
⟡ dufy (https://github.com/privet-kitty/dufy) - exact color manipulation and conversion in various color models. MIT 200 .
⟡ opticl (https://github.com/slyrus/opticl) - a library for representing and processing images. BSD_2Clause 17 .
⟡ Varjo (https://github.com/cbaggers/varjo) - Lisp to GLSL translator. BSD_2Clause 17 .
⟡ Vecto (http://www.xach.com/lisp/vecto/) - Simple vector drawing library. FreeBSD 39 .
⟡ zpng (http://www.xach.com/lisp/zpng/) - A library for creating PNG files. FreeBSD 39 .
⟡ pngload-fast (https://git.mfiano.net/mfiano/pngload) - A PNG (Portable Network Graphics) image format decoder in portable Common Lisp with an emphasis on speed. MIT 200 .
Those are bindings:
⟡ cl-raylib (https://github.com/bohonghuang/claw-raylib) NEW in 2023 - fully auto-generated Common Lisp bindings to Raylib and Raygui using claw and cffi-object. Apache 2.0.
⟡ glfw (https://github.com/shirakumo/glfw) NEW in 2023 - An up-to-date Common Lisp bindings library to the most recent GLFW OpenGL context management library.
⟡ common-cv (https://github.com/byulparan/common-cv) - the OpenCV (Open Source Computer Vision Library) binding library for CommonLisp. No license specified.
⟡ cl-cairo2 (https://github.com/rpav/cl-cairo2) - Cairo bindings. Boost 1.0 54 
⟡ cl-gd (http://weitz.de/cl-gd/) - A library providing an interface to the GD graphics library. FreeBSD 39 .
⟡ cl-horde3d (https://github.com/anwyn/cl-horde3d/) - FFI bindings to the Horde3D graphics library. Not available on Quicklisp. EPL 1.0 59 
⟡ cl-jpeg (https://github.com/sharplispers/cl-jpeg) - Baseline JPEG encoder and decoder library. 3-clause BSD 15 .
⟡ cl-liballegro (https://github.com/resttime/cl-liballegro) - Interface and bindings to the Allegro 5 game programming library. zlib 33 .
⟡ cl-opengl (https://github.com/3b/cl-opengl) - CFFI bindings to OpenGL, GLU and GLUT APIs. 3-clause BSD 15 .
⟡ cl-sdl2 (https://github.com/lispgames/cl-sdl2) - Bindings for SDL2 using C2FFI. Expat 14 .
⟡ CLinch (https://github.com/BradWBeer/CLinch) - Common Lisp 2D/3D graphics engine for OpenGL. FreeBSD 39 .
⟡ donuts (https://github.com/tkych/donuts) - Graphviz interface for Common Lisp. Expat 14 .
⟡ lispbuilder-sdl (https://github.com/lispbuilder/lispbuilder) - A set of bindings for SDL. Expat 14 .
⟡ lisp-magick-wand (https://github.com/TBRSS/lisp-magick-wand) - ImageMagick bindings. BSD 15 . Not in Quicklisp.
⟡ okra (https://www.common-lisp.net/project/okra/manual.html) - CFFI bindings to Ogre. Not available on Quicklisp. 3-clause BSD 15 .
⟡ cl-cuda (https://github.com/takagi/cl-cuda) - A library to use NVIDIA CUDA in Common Lisp programs. LLGPL 8 .
GUI
===
For an overview and a tutorial on GUI toolkits, see the Cookbook/GUI (https://lispcookbook.github.io/cl-cookbook/gui.html).
⟡ LispWork's CAPI (http://www.lispworks.com/products/capi.html) - A portable GUI toolkit, with mobile runtime. Proprietary, but comes with a free version.
⟡ Allegro's Common Graphics (https://franz.com/products/allegro-common-lisp/acl_gui_tools.lhtml)- a library of functions for writing windowized GUIs for Windows, Mac and Linux. Proprietary with a free version.
 - since Allegro 10.1 (March, 2022), the IDE and the Common Graphics toolkit runs in the browser (https://franz.com/ftp/pri/acl/cgjs/doc.html).
⟡ 👍 Qtools (https://github.com/Shinmera/qtools/) - A Qt toolkit, based on CommonQt. zlib 33 Also Qtools-ui (https://github.com/Shinmera/qtools-ui) (premade UI components), with videos 
(https://www.youtube.com/watch?v=KwASFOhYta4&index=7&list=PLkDl6Irujx9Mh3BWdBmt4JtIrwYgihTWp).
⟡ ⭐ CommonQt (https://github.com/commonqt/commonqt) - A Common Lisp binding for Qt4 via QtSmoke. FreeBSD 39 .
  ⟡ CommonQt5 (https://github.com/commonqt/commonqt5/) - bindings for Qt5.
* warn: currently difficult to install. Used in production© by SISCOG.
⟡ ⭐ ltk (http://www.peter-herth.de/ltk/) - A binding for the Tk toolkit. LLGPL 8 or GNU LGPL2.1 11 .
  ⟡ LTk Examples (https://peterlane.netlify.app/ltk-examples/) - Provides LTk examples for the tkdocs tutorial.
  ⟡ LTk Plotchart (https://peterlane.netlify.app/ltk-plotchart/) - A wrapper around the tklib/plotchart library to work with LTk. This includes over 20 different chart types (xy-plots, gantt charts, 3d-bar charts etc...).
⟡ nodgui (https://codeberg.org/cage/nodgui) - Bindings for the Tk toolkit, based on Ltk, with syntax sugar and additional widgets. LLGPL 8 .
  ⟡ 🎨 supports tk custom themes (https://wiki.tcl-lang.org/page/List+of+ttk+Themes), such as ttkthemes (https://ttkthemes.readthedocs.io/en/latest/themes.html) and Forest-ttk-theme (https://github.com/rdbende/Forest-ttk-theme).
  ⟡ supports an SDL frame as an alternative to the Tk canvas when fast rendering is needed. For 2D (pixel-based) and 3D rendering (using openGL).
⟡ IUP (https://github.com/lispnik/iup/) - CFFI bindings to the IUP (https://www.tecgraf.puc-rio.br/iup/) Portable User Interface library (pre-ALPHA).
 - IUP is cross-platform (Windows, macOS, GNU/Linux, with new Android, iOs, Cocoa and Web Assembly drivers), has many widgets, has a small api and is actively developed.
 - has a web view.
⟡ 🆕 cl-gtk4 (https://github.com/bohonghuang/cl-gtk4) - GTK4/Libadwaita/WebKit binding for Common Lisp. LGPL3 9 .
⟡ cl-cffi-gtk (https://github.com/crategus/cl-cffi-gtk) - Binding for GTK+3. GNU LGPL2.1 11 .
 - a tutorial: Learn Common Lisp by Example: GTK GUI with SBCL (https://dev.to/goober99/learn-common-lisp-by-example-gtk-gui-with-sbcl-5e5c)
⟡ cl-gtk2 (https://github.com/dmitryvk/cl-gtk2) - A binding for GTK+2. LLGPL 8 .
But that's not all.
⟡ for Electron, see:
  ⟡ Electron-lisp-boilerplate (https://github.com/mikelevins/electron-lisp-boilerplate) - a rudimentary boilerplate for building Electron apps that start a Lisp process.
  ⟡ ceramic (https://ceramic.github.io/) - a wrapper around simpler tools to create and build an Electron app for Common Lisp. It is currently broken and unmaintained, but some tools are workth having a look at.
  ⟡ NOTE: the main idea in embedding a lisp web app in Electron is to start the lisp webserver as an async process from Electron's main.js file, and to point the Electron window to the localhost URL. That's it.
⟡ CocoaInterface (https://github.com/plkrueger/CocoaInterface/) -
Cocoa interface for Clozure Common Lisp. Build Cocoa user interface
windows dynamically using Lisp code and bypass the typical Xcode
processes. It has
good documentation and a tutorial (https://github.com/plkrueger/CocoaInterface/blob/master/Documentation/UserInterfaceTutorial.pdf).
⟡ McCLIM (https://common-lisp.net/project/mcclim/) - An implementation of the Common Lisp Interface Manager, version II. GNU LGPL2.1 11 .
⟡ cl-webkit (https://github.com/joachifm/cl-webkit) - A binding to WebKitGTK+. Also adds web browsing capabilities to an application, leveraging the full power of the WebKit browsing engine. MIT 200 .
⟡ ftw (https://github.com/fjames86/ftw) - A Win32 GUI library. MIT 200 .
⟡ eql, eql5, eql5-android (https://gitlab.com/eql) - Embedded Qt4 and Qt5 Lisp, embedded in ECL, embeddable in Qt. Port of EQL5 to the Android platform. MIT 200 .
⟡ bodge-nuklear (https://github.com/borodust/bodge-nuklear) - Wrapper over the Nuklear (https://github.com/Immediate-Mode-UI/Nuklear) immediate mode GUI library. MIT 200 .
⟡ vk (https://github.com/JolifantoBambla/vk) - Common Lisp/CFFI bindings for the Vulkan API. MIT 200 .
Other utilities:
⟡ file-select (https://github.com/Shinmera/file-select) - A library to invoke the native system file dialog to select or create files. Zlib.
See also this demo to use Java Swing from ABCL (https://github.com/defunkydrummer/abcl-jazz).
Mobile
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ LispWork's mobile runtime (http://www.lispworks.com/products/lw4mr.html) - Android and iOs. Proprietary.
⟡ LQML (https://gitlab.com/eql/lqml) - a lightweight ECL binding to QML (both Qt5 and Qt6) derived from EQL5. LGPL and public domain.
hello-allien (https://github.com/Gleefre/hello-alien/), SBCL built for an Android application (very new, 2023).
Implementations
===============
⟡ ⭐ SBCL (http://www.sbcl.org/index.html) - Steel Bank Common Lisp. A fork of CMUCL; compiles to efficient machine code. Standard compliance 13 . Public domain, with some parts under Expat 14 and 3-clause BSD 15 .
  ⟡ see also: sbcl-librarian (https://github.com/quil-lang/sbcl-librarian) - Dynamic library delivery tools for SBCL. Create shared libraries that can be called from C or Python. MIT. Blog post 
(https://mstmetent.blogspot.com/2022/04/using-lisp-libraries-from-other.html). Full example (https://github.com/quil-lang/sbcl-librarian/tree/main/example).
  ⟡ SBCL-GOODIES (https://github.com/sionescu/sbcl-goodies) - Distributing binaries with Common Lisp and foreign libraries: libssl, libcrypto and libfixposix are statically baked in. MIT 200 .
  ⟡ Nightly Windows builds of SBCL (https://github.com/olnw/sbcl-builds) - Nightly builds of SBCL using MSYS2 UCRT64. See also Roswell's SBCL MSI builds (https://github.com/roswell/sbcl_bin/releases/).
  ⟡ sbcl-wiki (https://github.com/guicho271828/sbcl-wiki/wiki) - an open wiki to document SBCL's internals.
⟡ ⭐ CCL (//ccl.clozure.com/) - Clozure Common Lisp; compiler-only implementation, generates native code. LLGPL 8 .
⟡ ECL (https://common-lisp.net/project/ecl/) - Embeddable Common Lisp; compiles to C. GNU LGPL2.1 11 .
  ⟡ eclweb (https://github.com/chee/eclweb) is a proof-of-concept REPL inside a browser (https://repl.chee.party/) using Web Assembly (WASM).
⟡ ABCL (https://common-lisp.net/project/armedbear/) - Armed Bear Common Lisp; targets the JVM, compiles to bytecode. Standard conformance 4 . GNU GPL3 2 with Classpath exception 3 .
⟡ CLASP (https://github.com/drmeister/clasp) - a new Common Lisp implementation that seamlessly interoperates with C++ libraries and programs using LLVM for compilation to native code. This allows Clasp to take advantage of a vast array
of preexisting libraries and programs, such as out of the scientific computing ecosystem. LGPL2.1 11 (and others).
Proprietary:
⟡ LispWorks (http://www.lispworks.com/) - an integrated cross-platform development tool for Common Lisp.
  ⟡ reputed features include: the CAPI cross-platform and native GUI toolkit, the LispWorks IDE, the mobile platforme runtime (iOs, Android), its Java interface, the tree shaker to build lighter binaries, its KnowledgeWorks system for 
"rule-based, object-oriented, logical, functional and database programming", and more.
  ⟡ has a free edition, with limitations (heap size limit, time limit).
⟡ Allegro CL (https://franz.com/products/allegro-common-lisp/) - provides the full ANSI Common Lisp standard with many extensions.
  ⟡ reputed features include: the AllegroCache object persistence database system, the KnowledgeGraph system, its concurrent garbage collector, its web-based IDE, and more.
  ⟡ has a free edition. It includes AllegroCache, with a size limit.
Other implementations, mainly for historical purposes:
⟡ CMUCL (//www.cons.org/cmucl/) - An implementation from Carnegie Mellon University. Public domain. SBCL is a fork of CMUCL.
⟡ GNU CLISP (http://www.clisp.org/) - A GNU implementation; contains a compiler and an interpreter. Standard conformance 6 . GNU GPL3 2 . They develop on Gitlab (https://gitlab.com/gnu-clisp/clisp).
  ⟡ compiles to bytecode, its default REPL is more user friendly than SBCL's (with symbol completion and readline integration).
  ⟡ however, it is not actively developed, it doesn't comply entirely to the ANSI standard, it is less performant than SBCL and it is lacking compatibility features.
⟡ Corman Lisp (https://github.com/sharplispers/cormanlisp) - a Common Lisp development environment for Microsoft Windows running on Intel platforms. MIT 200 .
You can check the implementations' compatibility to common extensions here: portability.cl (https://portability.cl).
JSON
====
⟡ 👍 jzon (https://github.com/Zulu-Inuoe/jzon/) - a correct, safe and fast JSON parser. MIT 200 .
  ⟡ jzon is the only CL JSON library which correctly declines all invalid inputs per the official JSON test suite and accepts all valid inputs per that suite.
  ⟡ it doesn't crash on invalid input (jsown), doesn't choke on large datasets (Jonathan), and more.
  ⟡ v1.0 released in the Quicklisp dist of February, 2023.
  ⟡ "I believe jzon to be the superior choice and hope for it to become the new, true de-facto library in the world of JSON-in-CL once and for all."
⟡ jonathan (https://github.com/Rudolph-Miller/jonathan) - A JSON encoder and decoder. MIT 200 .
⟡ cl-json (https://github.com/sharplispers/cl-json) - A highly customizable JSON encoder and decoder. MIT 14 .
⟡ jsown (https://github.com/madnificent/jsown) - A reader and writer for the JSON format. Expat 14 .
⟡ shasht (https://github.com/yitzchak/shasht) - Common Lisp JSON reading and writing for the Kzinti. MIT 14 .
 - " Shasht is one of the two new libraries that I particularly like and is already in quicklisp. It is fast, it handles null correctly, it encodes CLOS objects, structures and hash-tables. It can also do incremental encoding." Sabra 
Crolleton.
See this extensive comparison (https://sabracrolleton.github.io/json-review) of JSON libraries.
JSON tools:
⟡ NJSON (https://github.com/atlas-engineer/njson) - Parser-agnostic JSON indexing (with JSON Pointer support), destructuring, and validation framework. BSD 15 .
⟡ json-mop (https://github.com/gschjetne/json-mop) - A metaclass for bridging CLOS and JSON objects. MIT 200 .
⟡ cl-json-pointer (https://github.com/y2q-actionman/cl-json-pointer) - A JSON Pointer implementation. MIT 200 .
⟡ cl-jwk (https://github.com/dnaeon/cl-jwk) - Common Lisp system for decoding public JSON Web Keys (JWK). BSD License.
and search for JSON RPC below.
YAML
====
⟡ cl-yacclyaml (https://github.com/mabragor/cl-yaclyaml) - a pure lisp YAML processor (loader, but not yet dumper). GPL3 2 .
⟡ cl-yaml (https://github.com/eudoxia0/cl-yaml.git) - a YAML parser and emitter built on top of libyaml. MIT 200 .
Language extensions
===================
⟡ ⭐ alexandria (https://common-lisp.net/project/alexandria/) - A general-purpose utility library. Public domain.
⟡ 👍 serapeum (https://github.com/TBRSS/serapeum/) - Another general-purpose utility library. Expat 14 .
⟡ rutils (https://github.com/vseloved/rutils) - radical yet reasonable syntactic utilities for Common Lisp. MIT 200 .
⟡ generic-cl (https://github.com/alex-gutev/generic-cl/) - Generic function interface to standard Common Lisp functions (equality, comparison, arithmetic, objects, iterator, sequences,…). MIT 200 . See also the more lightweight 
generic-comparability (https://github.com/pnathan/generic-comparability). LLGPL 8 .
⟡ anaphora (https://common-lisp.net/project/anaphora/) - A collection of anaphoric macros. Public domain.
⟡ ⭐ trivia (https://github.com/guicho271828/trivia/) - Optimized pattern-matching library. LLGPL 8 .
⟡ arrow-macros (https://github.com/hipeta/arrow-macros) - Clojure-like threading macros. MIT 200 .
⟡ hu.dwim.walker (https://github.com/hu-dwim/hu.dwim.walker) - a code walker and unwalker (aka AST parser and unparser). BSD 15 . See also this blog post (http://40ants.com/lisp-project-of-the-day/2020/04/0044-hu.dwim.walker.html).
Portability layers
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
A large list of portability layers is collected here: portability.cl/ (https://portability.cl/). Here are some of them:
⟡ trivial-arguments (https://github.com/Shinmera/trivial-arguments) - A portable library to retrieve the arguments list of a function. zlib 33 .
⟡ definitions (https://github.com/Shinmera/definitions) - a general definitions introspection library. It gives you the ability to retrieve definitions or bindings associated with designators such as symbols, packages, and names in 
general. zlib 33 .
⟡ dissect (https://shinmera.github.io/dissect) - when a lot of projects use the “trivial-backtrace” system that just gives them a string with a backtrace, Dissect allows you to capture, step, and completely inspect the stack trace on a 
variety of Lisp implementations. Also very useful for logging and other situations where execution is automatically continued, but the information of the current stack is still useful to store somewhere. zlib 33 .
  ⟡ ndebug (https://github.com/atlas-engineer/ndebug) - Framework for portable GUI (or any non-standard) debuggers, based on dissect (https://shinmera.github.io/dissect) and trivial-custom-debugger 
(https://github.com/phoe/trivial-custom-debugger). BSD 15 .
Changing the syntax
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ cl21 (https://github.com/cl21/cl21) - An experimental project to move Common Lisp into the 21st century. Expat 14 .
⟡ clamp (https://github.com/malisper/Clamp) - Arc language's brevity and conciseness to Common Lisp. Artistic License 2.0 51 .
  ⟡ also arc-compat (https://github.com/g000001/arc-compat) - Arc compatible package. Perl Foundation's Artistic Licence 2.0.
⟡ cl-syntax (https://github.com/m2ym/cl-syntax) - Reader syntax conventions. LLGPL 8 .
⟡ cl-2dsyntax (http://www.cliki.net/cl-2dsyntax) - An indentation-sensitive reader system. Not available on Quicklisp. Public domain.
⟡ cl-annot (https://github.com/m2ym/cl-annot) - Python-like annotations for Common Lisp. LLGPL 8 .
  ⟡ cl-annot-revisit (https://github.com/y2q-actionman/cl-annot-revisit/) - re-implementation of cl-annot. WTFPL.
⟡ cl-reader (https://github.com/digikar99/reader) - A utility library
intended at providing reader macros for lambdas, mapping, accessors,
hash-tables and hash-sets. MIT 200 .
For strings:
⟡ ⭐ cl-interpol (https://github.com/edicl/cl-interpol/) - A set of reader modifications to allow string interpolation. BSD 15 .
⟡ mstrings (https://git.sr.ht/~shunter/mstrings) - a reader macro to provide visually appealing multiline blocks. An M-string trims leading whitespace, concatenates lines together, etc. BSD_3Clause 15 .
⟡ pythonic-string-reader (https://github.com/smithzvk/pythonic-string-reader) - A simple and unobtrusive read table modification inspired by Python's three quote strings. BSD_3Clause 15 .
⟡ cl-heredoc (https://github.com/outergod/cl-heredoc) - a "heredocs" (https://github.com/outergod/cl-heredoc) dispatcher. GPL3 2 . Allows to write: 
#>eof>Write whatever (you) "want", no matter what characters, until the magic end sequence has been reached.eof
CLOS extensions
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ ⭐ closer-mop (https://github.com/pcostanza/closer-mop) - A compatibility layer that rectifies many absent or incorrect MOP features. Expat 14 .
⟡ specialization-store (https://github.com/markcox80/specialization-store/) - generic functions based on types. Simplified BSD License variant.
⟡ filtered-functions (https://github.com/pcostanza/filtered-functions) - enable the use of arbitrary predicates for selecting and applying methods. MIT 200 .
⟡ inlined-generic-function (https://github.com/guicho271828/inlined-generic-function) -
Bringing the speed of Static Dispatch to CLOS. LLGPL 8 .
⟡ static-dispatch (https://github.com/alex-gutev/static-dispatch) - allows standard generic function dispatch to be performed statically (at compile time) rather than dynamically (runtime). This is similar to what is known as 
"overloading" in languages such as C++ and Java. MIT 200 .
⟡ dynamic-mixins (https://github.com/rpav/dynamic-mixins) - simple, dynamic class combination. BSD_2Clause 17 .
⟡ fast-generic-functions (https://github.com/marcoheisig/fast-generic-functions) - Seal your generic functions for an extra boost in performance. MIT 200 .
⟡ polymorphic functions (https://github.com/digikar99/polymorphic-functions) - A function type to dispatch on types instead of classes with partial support for dispatching on optional and keyword argument types. Still experimental (May,
2021). MIT 200 .
 - polymorphic-functions dispatch on the types of the arguments supplied to it. This helps dispatching on specialized arrays as well as user-defined types.
 - for differences with specialization-store and fast-generic-functions, see its README.
Writing terser defclass forms:
⟡ defclass-std (https://github.com/EuAndreh/defclass-std) - a shortcut macro to write DEFCLASS forms quickly. LLGPL 8 .
⟡ nclasses (https://github.com/atlas-engineer/nclasses) - Syntactic sugar for class and generic function declarations. Fork of hu.dwim.defclass-star (https://github.com/hu-dwim/hu.dwim.defclass-star). Features type inference, automatic 
accessors, inline initform syntax, automatic exports, and other conveniences. BSD 15 .
And also:
⟡ slot-extra-options (https://github.com/some-mthfka/slot-extra-options) - lets you build a metaclass which in turn lets you specify extra slot options in its classes. LGPL3 9 .
Function extensions
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ cl-hooks (https://github.com/scymtym/architecture.hooks/) - Hooks extension point mechanism (as known, e.g., from GNU Emacs). LGPL.
⟡ method-hooks (https://gitlab.com/Gnuxie/method-hooks) - When CLOS method combination allow only one hook per method, this library allows an arbitrary number of them. Mozilla Public Licence.
⟡ cl-advice (https://github.com/lisp-mirror/budden-tools/blob/213ab2b52a1b0c0b496efd30c3b5143f5c8e1ff2/cl-advice/README.md) - an attempt of portable layer advice library for SBCL, CCL, LispWorks and Allegro. Not in Quicklisp.
⟡ nhooks (https://github.com/atlas-engineer/nhooks) - an enhanced implementation of hooks (extension points) with crucial improvements.
Iteration
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ ⭐ iterate (https://common-lisp.net/project/iterate/) - An iteration construct for Common Lisp which is extensible and Lispier. MIT 200 .
⟡ for (https://shinmera.github.io/for/) - A concise, lispy and extensible iteration macro. Unlike loop it is extensible and sensible, and unlike iterate it does not require code-walking and is easier to extend. zlib 33 .
⟡ series (https://series.sourceforge.net/) - Functional style without any runtime penalty at all. MIT 200 .
⟡ trivial-do (https://github.com/yitzchak/trivial-do/) - Additional dolist style macros for Common Lisp. MIT 200 .
⟡ doplus (https://github.com/alessiostalla/doplus) – another extensible iteration library, similar to :for.
⟡ cl-transducers (https://git.sr.ht/~fosskers/cl-transducers) - Ergonomic, efficient data processing. LGPL3 9 .
  ⟡ "Transducers are an ergonomic and extremely memory-efficient way to process a data source. Here “data source” means simple collections like Lists or Vectors, but also potentially large files or generators of infinite data."
  ⟡ "It is, in general, the most complete implementation of the Transducer pattern."
  ⟡ a "modern" API with map, filter, take, repeat, cycle, fold…
⟡ snakes (https://github.com/BnMcGn/snakes) - Python style generators for Common Lisp. Includes a port of itertools. Apache2 89 .
⟡ picl (https://github.com/anlsh/picl) - An (almost) complete port of Python's itertools package, complete with laziness where applicable, and not relying on cl-cont. MIT 200 .
⟡ gtwiwtg (https://cicadas.surf/cgit/colin/gtwiwtg.git/about/) - A lazy sequences library. Similar to 'series' but not as complete. However it has a 'modern' API with stuff like take, filter, for, fold, etc. that is easy to use.
⟡ gmap (https://github.com/slburson/misc-extensions/blob/master/src/gmap.lisp) - A concise and extensible iteration facility that has the advantage of integrating well with FSet (see the Data Structures section), as it was written by 
the same author. In Quicklisp as part of misc-extensions. Public domain.
Lambda shorthands
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ fn (https://github.com/cbaggers/fn) - a couple of lambda shorthand macros. (fn* (+ _ _)) --> (lambda (_) (+ _ _)). Public domain.
⟡ f-underscore (https://gitlab.common-lisp.net/bpm/f-underscore) - a tiny library of functional programming utils. (f_ (+ _ _)) -> (lambda (_) (+ _ _)). Public domain.
⟡ cl-punch (https://github.com/windymelt/cl-punch/) - Scala-like anonymous lambda literals. (mapcar ^(* 2 _) '(1 2 3 4 5)). MIT 200 .
See also CL21 and Rutils (https://github.com/vseloved/rutils).
Non-deterministic, logic programming
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ cl-prolog2 (https://github.com/guicho271828/cl-prolog2) - Common Interface to ISO Prolog implementations from Common Lisp. MIT 200 .
⟡ Screamer (https://github.com/nikodemus/screamer) - augment Common
 Lisp with practically all of the functionality of both Prolog and
 constraint logic programming
 languages. Blog post (https://chriskohlhepp.wordpress.com/reasoning-systems/specification-driven-programming-in-common-lisp/)
 solving Project Euler puzzles. MIT 200 .
⟡ Screamer+ (https://github.com/yakovzaytsev/screamer-plus) - increasing the expressiveness of SCREAMER. MIT 200 .
⟡ Temperance (https://github.com/sjl/temperance) - logic programming. MIT 200 . A focus on performance, with General Game Playing in mind.
Reactive programming
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ Cells (https://github.com/kennytilton/cells) - an implementation of the dataflow programming paradigm, reactive spreadsheet-like expressiveness for CLOS. Used to build an algebra learning system (http://tiltontec.com/). With 
documentation (https://github.com/stefano/cells-doc/). Lisp LGPL.
⟡ lwcells (https://github.com/kchanqvq/lwcells) - Light Weight Cells.
  ⟡ LWCELLS is a dataflow extension to Common Lisp. It maintains a consistent state of cells according to functions specifying their relation. LWCELLS is designed to be simple, clean, compositional and flexible.
Contract programming
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ quid-pro-quo (https://github.com/sellout/quid-pro-quo) - a contract
 programming library in the style of Eiffel’s Design by Contract ™. Public domain.
Typing
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ 👍 Coalton (https://github.com/coalton-lang/coalton/) - an efficient, statically typed functional programming language that supercharges Common Lisp. MIT 200 .
⟡ 👍 trivial-types (https://github.com/m2ym/trivial-types) - provides missing but important type definitions such as proper-list, association-list, property-list and tuple. LLGPL 8 .
⟡ defstar (https://bitbucket.org/eeeickythump/defstar/src/master/) - a collection of macros for easy inclusion of type declarations for arguments in lambda lists. GNU GPL3 2 
⟡ algebraic-data-types (https://github.com/stylewarning/cl-algebraic-data-type) - defining algebraic data types in a similar spirit to Haskell or Standard ML, as well as for operating on them. BSD_3Clause 15 .
See also:
⟡ typo (https://github.com/marcoheisig/Typo/) - A portable type inference library for Common Lisp. MIT 200 .
⟡ experimental: PELTADOT (https://gitlab.com/digikar/peltadot/) - PELTADOT Extends Lisp’s Types And Dispatches Over Them.
Theorem provers
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ ACL2 (https://www.cs.utexas.edu/users/moore/acl2/) - a logic and programming language in which you can model computer systems, together with a tool to help you prove properties of those models.
  ⟡ used in the industry since the 1990s.
  ⟡ it supports a subset of the ANSI standard Common Lisp programming language.
  ⟡ "Companies that have used ACL2 regularly include AMD, Centaur Technology, IBM, Intel, Kestrel Institute, Motorola/Freescale, Oracle and Rockwell Collins." (source (https://royalsocietypublishing.org/doi/10.1098/rsta.2015.0399))
  ⟡ Proofpad (https://github.com/calebegg/proof-pad/), an online IDE for ACL2.
  ⟡ ACL2-kernel (https://github.com/tani/acl2-kernel), a Jupyter Kernel for ACL2.
  ⟡ ACL2 Sedan (http://acl2s.ccs.neu.edu/acl2s/doc/), an Eclipse plugin that provides a modern IDE for ACL2, used with students at universities.
* paper: **Using ACL2 to teach students about software testing** (https://cgi.cse.unsw.edu.au/~eptcs/content.cgi?ACL22022).
⟡ NASA's PVS (https://pvs.csl.sri.com/), the Prototype Verification System, and NASAlib (https://github.com/nasa/pvslib), a collection of formal development libraries.
  ⟡ its 63 top-level libraries span the fields of: real analysis, limits, continuity, derivatives, integrals; complex integration; directed graphs; exact real arithmetic including trig functions; interval arithmetic and numerical 
approximations; linear algebra; 2-D, 3-D, 4-D, and n-dimensional vectors… and more.
Learning and Tutorials
=====================
Online ##
Beginner
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ Learn X in Y minutes - Where X = Common Lisp (https://learnxinyminutes.com/docs/common-lisp/) - Small Common Lisp tutorial covering the essentials.
⟡ Lisp Koans 201 - The project guides the learner progressively through many Common Lisp language features.
⟡ Practical Common Lisp 206 - A good introductory text to Common Lisp, with practical examples.
  ⟡ better read with a Firefox add-on: Practical-cl beautified (https://github.com/vale981/practical-cl-beautified).
  ⟡ translated in Chinese simplified (https://binghe.github.io/pcl-cn/)
⟡ Common LISP: A Gentle Introduction to Symbolic Computation (http://www.cs.cmu.edu/afs/cs.cmu.edu/user/dst/www/LispBook/index.html) - A nice introduction into the language.
⟡ Successful Lisp (http://successful-lisp.blogspot.com/) - A good book for beginners with some programming background.
⟡ Lisp Quickstart (https://cs.gmu.edu/~sean/lisp/LispTutorial.html) - A good tutorial to get up and code Common Lisp quickly.
⟡ Casting SPELs in LISP (http://www.lisperati.com/casting.html) - A fun way to learn LISP while reading a comic book.
⟡ 📹 Common Lisp Programming: from novice to effective developer (https://www.udemy.com/course/common-lisp-programming/?referralCode=2F3D698BBC4326F94358) - A learning video series on the Udemy platform (full content under paid access).
By an active lisper and community contributor (@vindarel). Github home (https://github.com/vindarel/common-lisp-course-in-videos/).
 > Thanks for supporting my work on Udemy. I can send a free link to students, just contact me.
Intermediate
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ The Common Lisp Cookbook (https://lispcookbook.github.io/cl-cookbook/)
⟡ Lisp Tips (https://github.com/lisp-tips/lisp-tips/issues/) - A blog with useful tips and tricks. A continuation of Common Lisp tips (http://lisptips.com/).
⟡ Lisp project of the day (http://40ants.com/lisp-project-of-the-day/) - A blog showcasing many Lisp libraries.
Advanced
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ Let Over Lambda 156 - A book on advanced macro techniques. The first six chapters are available online.
⟡ On Lisp (http://www.paulgraham.com/onlisp.html) - Paul Graham's amazing book on Lisp macros (and other interesting things).
⟡ Programming Algorithms in Lisp (https://link.springer.com/book/10.1007/978-1-4842-6428-7) - Updated version of "Programming Algorithms (https://leanpub.com/progalgs)"; A comprehensive guide to writing efficient programs with data 
structures and algorithms in Lisp.
Coding platforms
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ Codewars (https://docs.codewars.com/languages/commonlisp/) - a code training platform, with Common Lisp support (SBCL).
Web Development
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ Lisp for the Web (https://leanpub.com/lispweb) - A book that walks you through building a voting web application in three tiers.
⟡ Lisp Web Tales (https://leanpub.com/lispwebtales) - Simple tutorials using hunchentoot (http://edicl.github.io/hunchentoot/), cl-redis (https://github.com/vseloved/cl-redis), restas (https://github.com/archimag/restas), SEXML 
(https://github.com/madnificent/SEXML), Postmodern (https://github.com/marijnh/Postmodern), and more.
⟡ Section on Web Development in The Common Lisp Cookbook (https://lispcookbook.github.io/cl-cookbook/web.html) - An introductory tutorial covering web server setup, routing, weblocks, templating, error handling, packaging, hot 
reloading, database connection, and deployment, amongst other topics in the current lisp web development ecosystem.
Reference
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ NEW! CL CommunitySpec (https://cl-community-spec.github.io/pages/index.html) - a rendition of the Common Lisp ANSI Specification draft.
  ⟡ with an interactive search, syntax highlighting! And open-source.
⟡ NEW! novaspec (https://novaspec.org/) - a modern rendition of the CL ANSI draft.
  ⟡ not open-source?
⟡ Common Lisp Quick Reference (http://clqr.boundp.org/index.html) - A distilled, pocket-size version of the ANSI CL spec. Available for download as a PDF.
⟡ CLHS (http://www.lispworks.com/documentation/lw50/CLHS/Front/index.htm) - The Common Lisp HyperSpec; the ANSI CL standard, in hypertext form.
⟡ CLOS MOP specification (https://clos-mop.hexstreamsoft.com/) - A modern public domain online version of chapters 5 and 6 of The Art of the Metaobject Protocol
⟡ Common Lisp Standard Draft (pdf) (https://franz.com/support/documentation/cl-ansi-standard-draft-w-sidebar.pdf) - The standard draft of the Common Lisp specifications, in a well formatted PDF with a sidebar.
  ⟡ also dpans2texi (https://github.com/mmontone/dpans2texi/releases/) - the standard draft converted to Texinfo and published as a well formatted PDF.
⟡ Common Lisp the Language (http://www.cs.cmu.edu/Groups/AI/html/cltl/cltl2.html) - The original standard for Common Lisp before the ANSI spec.
⟡ Minispec (https://lamberta.github.io/minispec/) - A friendlier, but less-complete, version of CLHS. Also contains documentation for some commonly-used CL libraries (such as Alexandria).
⟡ Simplified Common Lisp reference (http://jtra.cz/stuff/lisp/sclr/index.html) - The simplified version of CLHS.
⟡ CDR (https://cdr.common-lisp.dev/) - Common Lisp Document Repository. a repository of documents that are of interest to the Common Lisp community. The most important property of a CDR document is that it will never change: if you 
refer to it, you can be sure that your reference will always refer to exactly the same document.
 - the Common Lisp Document Repository is hosted at Zenodo (https://zenodo.org/communities/cdr/).
Offline ##
The CLHS is available offline via an archive (ftp://ftp.lispworks.com/pub/software_tools/reference/HyperSpec-7-0.tar.gz) and as doc sets in Dash (https://kapeli.com/dash), Zeal (https://zealdocs.org/) and Velocity 
(https://velocity.silverlakesoftware.com/).
Beginner
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ Land of Lisp (http://landoflisp.com/) - A fun, game-oriented introduction to Common Lisp.
⟡ Practical Common Lisp 206 - A good introductory text to Common Lisp, with practical examples.
Intermediate
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ ANSI Common Lisp (http://www.paulgraham.com/acl.html) - A thorough, practical covering of the entire language, with exercises. Not recommended as a starter text, due to some caveats 20 .
⟡ Common Lisp Recipes (http://weitz.de/cl-recipes/) - Common Lisp Recipes is a collection of solutions to problems and answers to questions you are likely to encounter when writing real-world applications in Common Lisp. Published in 
2015.
Advanced
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ Let Over Lambda 156 - A book on advanced macro techniques. All eight chapters are available in the print copy.
⟡ Object-Oriented Programming in Common Lisp: A Programmer's Guide to CLOS 21 - An old, but very thorough book on CLOS.
⟡ Paradigms of Artificial Intelligence Programming: Case Studies in Common Lisp 157 - A book on programming AI that covers some advanced Lisp.
  ⟡ with a web version: https://norvig.github.io/paip-lisp/ (https://norvig.github.io/paip-lisp/#/)
Other books
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ Building Problem Solvers (https://www.qrg.northwestern.edu/bps/readme.html) (PDF (http://www.qrg.northwestern.edu/bps/BPS-Searchable.pdf)) by Ken Forbus and Johan de Kleer, made available for free by MIT Press - a unique book among 
standard artificial intelligence texts in combining science and engineering, theory and craft to describe the construction of AI reasoning systems, and including code illustrating the ideas.
Community
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ /r/Common_Lisp (https://www.reddit.com/r/Common_Lisp/) - subreddit about Common Lisp
⟡ /r/learnlisp (https://www.reddit.com/r/learnlisp/) - a subreddit to ask questions and get help about Lisp
⟡ common-lisp.net (https://common-lisp.net)
⟡ lisp-lang.org (https://lisp-lang.org/)
⟡ Lisp Discord Server (https://discord.gg/hhk46CE)
⟡ #commonlisp (https://irclog.tymoon.eu/libera/%23commonlisp) on Libera Chat - main Common Lisp IRC channel.
⟡ #lisp (https://irclog.tymoon.eu/libera/%23lisp) on Libera Chat - IRC channel for all Lisp dialects.
⟡ #clschool on Libera Chat - IRC channel for learning Common Lisp.
⟡ #lispcafe on Libera Chat - IRC channel for off-topic discussions.
⟡ Planet Lisp (http://planet.lisp.org/) - A meta blog that collects the contents of various Lisp-related blogs.
⟡ Common Lisp chat (https://chat.hexstreamsoft.com/) - Keybase team with well-defined rules and retention policies.
Library Manager
===============
⟡ ⭐ Quicklisp 16 - A library manager containing many libraries, with easy depencency management. Expat 14 .
  ⟡ ql-https (https://github.com/rudolfochrist/ql-https) - shell out to cURL and use HTTPS by default.
  ⟡ Quicklisp bundles (https://quicklisp.org/beta/bundles.html) - self-contained sets of systems that are exported from Quicklisp and loadable without involving Quicklisp.
⟡ 👍 CLPM (https://www.clpm.dev) - A package manager for Common Lisp that strives to cleanly separate the package manager process itself from the client image that uses it. BSD_2Clause 17 .
  ⟡ CLPM comes as a pre-built binary, supports HTTPS by default, supports installing multiple package versions, supports versioned systems, and more.
⟡ Ultralisp (http://ultralisp.org/) - A Quicklisp distribution which updates every 5 minutes and to which one can add his project in one click. BSD 15 .
⟡ 👍Roswell (https://github.com/roswell/roswell) - a Lisp implementation installer, script launcher and more. MIT 200 .
⟡ Qlot (https://github.com/fukamachi/qlot) - A project-local library installer, similar to Bundler or Virtualenv. Expat 14 .
  ⟡ how to use it from the Lisp REPL (https://github.com/svetlyak40wt/qlot-without-roswell) without Roswell.
⟡ Quicksys (https://lisp.com.br/quicksys/) - install systems from multiple Quicklisp distributions. MIT 200 .
⟡ Quickutil (https://github.com/stylewarning/quickutil) - A utility manager, similar to Quicklisp, but for small utilities rather than whole libraries. 3-clause BSD 15 .
see also:
⟡ (NEW! as of May, 2023) ocicl (https://github.com/ocicl/ocicl) - a new and experimental alternative to Quicklisp, built on tools from the world of containers. MIT 200 .
⟡ trivial-system-loader (https://github.com/atgreen/trivial-system-loader) - A system installation/loading abstraction for Common Lisp.
  ⟡ play nice with people using another library manager than Quicklisp: instead of hard-coding (ql:quickload :mysystem), use (tsl:load-system :mysystem). tsl:load-system will first try to use ocicl if available, then quicklisp, then 
plain asdf:load-system.
might help:
⟡ redist (https://github.com/shirakumo/redist) - facilities to produce Quicklisp distributions.
⟡ quick-patch (https://github.com/tdrhq/quick-patch/) - easily override quicklisp projects without using git submodules. MPL-2.0.
⟡ print-licenses (https://github.com/vindarel/print-licenses) - print licenses used by a project and its dependencies. MIT 200 .
⟡ asdf-dependency-graph (https://github.com/digikar99/asdf-dependency-graph/) - A minimal wrapper around dot to generate an image of the dependencies graph.
Interfaces to other package managers
⟡ linux-packaging (https://gitlab.com/ralt/linux-packaging) - build .deb, .rpm or .pkg packages for your application with a single ASDF declaration. Uses fpm under the hood. MIT 200 .
⟡ qldeb (https://github.com/ralt/qldeb) - Quicklisp systems to debian packages, along with deb-packager (https://github.com/ralt/deb-packager) (simply create a debian package by defining an s-expression) and an introductory blog post 
(http://margaine.com/2015/12/22/quicklisp-packagecloud-debian-packages.html). Both MIT 200 .
⟡ ql-to-deb (https://github.com/dimitri/ql-to-deb) - Update cl- debian packages from Quicklisp releases. WTFPL.
⟡ dh-quicklisp-buildapp (https://github.com/ralt/dh-quicklisp-buildapp) - debhelper utility to let you compile your quicklisp-based Common Lisp code into a buildapp binary in a .deb with almost no effort. MIT 200 .
⟡ cl-brewer (https://github.com/can3p/cl-brewer) - Homebrew formula builder for (command line) common lisp applications. Public domain.
⟡ flatpack-common-lisp (https://gitlab.com/ralph-schleicher/flatpak-common-lisp) - A BuildStream project for building Flatpak based runtime environments for Common Lisp applications.
⟡ alien-works-delivery (https://github.com/borodust/alien-works-delivery) - WIP system for delivering Common Lisp applications as executable bundles. For now it only supports AppImage format for Linux and MSIX for Windows, but .APK for 
Android and later MacOSX and iOS bundle formats are planned too.
⟡ cl-nix-lite (https://github.com/hraban/cl-nix-lite) - Common Lisp module for Nix, without Quicklisp. AGPL-3.0 51 
See also:
- asdf-sbcl (https://github.com/smashedtoatoms/asdf-sbcl), a plugin for the universal package manager.
- 📹 this Youtube video (https://www.youtube.com/watch?v=lGS4sr6AzKw) (by 40ants, 2023) on how to use alien-works-delivery and linux-packaging.
Machine Learning
================
⟡ MGL (https://github.com/melisgl/mgl) - a machine learning library for backpropagation neural networks, boltzmann machines, gaussian processes and more. MIT 200 .
  ⟡ some parts originally contributed by Ravenpack International.
  ⟡ used by its author (https://github.com/melisgl) to win (https://github.com/melisgl/higgsml) the Higgs Boson Machine Learning Challenge.
  ⟡ more about the author: he also won the Google AI Challenge (https://en.wikipedia.org/wiki/AI_Challenge) in 2010 using Common Lisp, but without MGL, as no machine learning was needed. A related talk 
(https://www.youtube.com/watch?v=7sgERtZkycU) (59', 2013).
⟡ clml (https://github.com/mmaul/clml) - originally developed by Mathematicl Systems Inc., a Japanese company. With a tutorial (https://mmaul.github.io/clml.tutorials//2015/08/08/CLML-Time-Series-Part-1.html). LLGPL 8 .
⟡ antik (https://www.common-lisp.net/project/antik/) - a foundation for scientific and engineering computation in Common Lisp. GPL. Also mgl-mat (https://github.com/melisgl/mgl-mat) and LLA (https://github.com/tpapp/lla).
Credit: borretti.me's State of CL Ecosystem 2015 (http://borretti.me/article/common-lisp-sotu-2015#machine-learning).
Natural Language Processing
===========================
⟡ 🚀 sparser (https://github.com/ddmcdonald/sparser) - A natural language understanding system for English. Eclipse 209 .
  ⟡ > a model-driven, rule-based language text analysis system for large volume, high-precision information extraction. At its heart, Sparser is a bottom-up, phrase-structure-based chart parser, optimized for semantic grammars and 
partial parsing.
⟡ cl-nlp (https://github.com/vseloved/cl-nlp) - Natural language processing toolset. Apache2.0 89 .
⟡ babel2 (https://github.com/lucas8/Babel2/) - A Fluid Construction Grammar implementation, computational framework, and unification-based grammar formalism Apache2.0 89 .
Network and Internet
====================
See Cliki (http://www.cliki.net/Web) for more.
HTTP clients
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ 👍 Dexador (https://github.com/fukamachi/dexador) - An HTTP client, that aims at replacing Drakma. MIT 200 .
⟡ Carrier (https://github.com/orthecreedence/carrier) - A lightweight, async HTTP client built on top of cl-async and fast-http. MIT 200 .
⟡ fast-http (https://github.com/fukamachi/fast-http) - A fast HTTP request/response parser for Common Lisp. MIT 200 .
⟡ http2 (https://github.com/zellerin/http2/) - HTTP/2 implementation in Common Lisp. MIT 200 .
HTTP Servers
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ ⭐ Hunchentoot (http://weitz.de/hunchentoot/) - A web server. 2-clause BSD 207 
⟡ 👍Clack (https://github.com/fukamachi/clack) - A web application environment inspired by Rack and WSGI. LLGPL 8 . Provides a unified interface to a webserver of choice (default is Hunchentoot). With more getting started guide 
(https://jasom.github.io/clack-tutorial/posts/getting-started-with-clack/).
⟡ zaserve (https://github.com/gendl/aserve) - A portable fork of AllegroServe, by Franz Inc. LLGPL 8 .
⟡ wookie (https://github.com/orthecreedence/wookie) - Asynchronous HTTP server. Expat 14 .
⟡ woo (https://github.com/fukamachi/woo) - A fast non-blocking HTTP server on top of libev. MIT 200 .
⟡ cl-http2-protocol (https://github.com/akamai/cl-http2-protocol) - a pure Common Lisp transport agnostic implementation of the HTTP/2 protocol at draft-14. MIT 200 .
Hunchentoot plugins
⟡ 👍 easy-routes (https://github.com/mmontone/easy-routes) - a routes handling system on top of Hunchentoot. It supports dispatch based on HTTP method, arguments extraction from the url path, decorators, url generation from route name, 
etc. MIT 200 .
⟡ hunchentoot-cgi (https://github.com/slyrus/hunchentoot-cgi) - a library for executing CGI scripts from the hunchentoot webserver. BSD 207 .
⟡ hunchentoot-multi-acceptor (https://github.com/moderninterpreters/hunchentoot-multi-acceptor/) - Route multiple domains (virtual hosts) on a single hunchentoot acceptor using a single port. Apache2.0 89 .
⟡ hunchentoot-errors (https://github.com/mmontone/hunchentoot-errors) - Augments Hunchentoot error pages and logs with request and session information. MIT 200 .
See also:
⟡ cl-tbnl-gserver-tmgr (https://github.com/mdbergmann/cl-tbnl-gserver-tmgr) - Hunchentoot Gserver-based taskmanager. cl-gserver is an actor-like message-passing library (see below in "Actors pattern"). Experimental.
Clack plugins
⟡ tiny-routes (https://github.com/jeko2000/tiny-routes) - A tiny routing library for Common Lisp targeting Clack. BSD_3Clause 15 .
⟡ clack-errors (https://github.com/eudoxia0/clack-errors) - Error page middleware for Clack. LLGPL 8 .
⟡ clath (https://github.com/BnMcGn/clath) - a single sign-on
 middleware for Clack. It allows basic login with OAuth1.0a, OAuth2
 and OpenID. At the time of writing, it supports authentication from
 Google, Twitter, LinkedIn, StackExchange, Reddit and Github. Apache2.0 89 .
⟡ clack-pretend (https://github.com/BnMcGn/clack-pretend) - a testing
 and debugging tool for clack. Apache2.0 89 .
⟡ hermetic (https://github.com/eudoxia0/hermetic) - Security for Clack-based web applications. Expat 14 .
⟡ live-reload (https://github.com/knobo/live-reload) - Live reload prototype for clack. LLGPL 8 .
⟡ clack-static-asset-middleware (https://github.com/fisxoj/clack-static-asset-middleware) - a cache-busting static asset middleware for the clack. MIT 200 .
For routing, we can also use Snooze (see below).
Web frameworks
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ Caveman (https://github.com/fukamachi/caveman) - A powerful web framework. LLGPL 8 .
 Example projects: Quickdocs (https://github.com/quickdocs)
⟡ ningle (https://github.com/fukamachi/ningle) - A super-micro web framework. LLGPL 8 .
 - jingle (https://github.com/dnaeon/cl-jingle) - based on ningle, adds bells and whistles, such as middlewares.
- includes an OpenAPI and Swagger UI demo.
⟡ radiance (https://github.com/Shirakumo/radiance) - A web application environment and framework . zlib 33 .
REST-focused frameworks:
⟡ 👍 Snooze (https://github.com/joaotavora/snooze) - A RESTful web framework. Web server agnostic. Currently has support for Hunchentoot and Clack. Routes are just functions and HTTP conditions are just Lisp conditions. LLGPL 8 .
⟡ cl-rest-server (https://github.com/mmontone/cl-rest-server) - a library for writing REST web APIs. Features validation with schemas, annotations for logging, caching, permissions or authentication, documentation via Swagger, etc. MIT 
200 .
See OpenAPI, OData and other libraries below.
Isomorphic web frameworks
⟡ Weblocks (Reblocks) (https://github.com/40ants/reblocks) - A widgets-based framework with a built-in ajax update mechanism that "solves the JavaScript problem". LLGPL 8 .
 - example code bases: Ultralisp (https://github.com/ultralisp/ultralisp/), krasnodar (https://github.com/lct23/krasnodar), a dashboard made for a hackaton (2024) (demo video 
(https://diode.zone/videos/watch/9e379a86-c530-4e9d-b8be-7437b1f7200b)).
⟡ CLOG (https://github.com/rabbibotton/clog) - The Common Lisp Omnificent GUI. Uses web technology to produce graphical user interfaces for applications locally or remotely. BSD_3Clause 15 .
 - CLOG is based on the ideas of GNOGA, a framework the author wrote for Ada and used in commercial production code since 2013.
⟡ Interactive SSR (https://github.com/interactive-ssr/client/blob/master/main.org/) - ISSR allows you to make interactive web pages without writing client scripting. No knowledge about Javascript or DOM is necessary.
 - it is not unlike Phoenix LiveView or Hotwire.
Parsing html
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ 👍 Plump 71 - A lenient HTML/XML parser, tolerant on malformed markup. zlib 33 . Best used with lquery 72 and clss (https://github.com/Shinmera/CLSS).
Querying HTML/DOM, web scraping
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ 👍 lquery 72 - A jQuery-like HTML/DOM manipulation library. zlib 33 .
⟡ scrapycl (https://40ants.com/scrapycl/) - web scraping framework for writing crawlers in Common Lisp. Unlicense.
  ⟡ relying on lquery.
See also the XML section below for xpath libraries and more.
HTML generators and templates
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ 👍 spinneret (https://github.com/ruricolist/spinneret) - Common Lisp HTML5 generator. Expat 14 .
⟡ ⭐ cl-who (http://weitz.de/cl-who/) - The venerable HTML generator. FreeBSD 39 .
⟡ ⭐ Djula (https://github.com/mmontone/djula) - A port of Django's template engine to Common Lisp. Expat 14 .
 - cl-djula-tailwind (https://github.com/rajasegar/cl-djula-tailwind) - use TailwindCSS classe in your Djula templates without any JavaScript or Node.js tooling.
⟡ TEN (https://github.com/mmontone/ten) - the completness of Djula meets the usability of Eco. MIT 200 .
⟡ eco (https://github.com/eudoxia0/eco) - Fast, flexible, designer-friendly template engine. Expat 14 .
⟡ cl-closure-template (https://github.com/archimag/cl-closure-template) - Implementation of Google's Closure templates, where compiling a template creates a function that generates the result. LLGPL 8 .
⟡ flute (https://github.com/ailisp/flute) - An easily composable HTML5 generation library with the most simplistic syntax. MIT 200 .
⟡ clip (https://shinmera.github.io/clip) - An HTML template processor where the templates are written in HTML. zlib 33 .
⟡ lsx (https://github.com/fukamachi/lsx/) and markup (https://github.com/moderninterpreters/markup) - Two JSX-like templating engines, where HTML tags are Common Lisp code. markup comes with an Emacs package.
URI handling
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ quri (https://github.com/fukamachi/quri) - Another URI library for
 Common Lisp. Supports userinfo, IPv6 hostname, encoding/decoding
 utilities,… BSD_3Clause 15 .
⟡ cl-slug (https://github.com/EuAndreh/cl-slug) - a small library to make slugs, mainly for URIs, transform in CamelCase, remove accentuation and punctuation, for english and beyound. LLGPL 8 .
Javascript
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ ⭐ Parenscript (https://common-lisp.net/project/parenscript/) - A translator from Common Lisp to Javascript. 3-clause BSD 15 . See Trident-mode (https://github.com/johnmastro/trident-mode.el), an Emacs mode that provides live 
interaction with the browser.unlicence 5 .
  ⟡ paren6 (https://github.com/BnMcGn/paren6/) - a set of ES6 macros for Parenscript.
⟡ JSCL (https://github.com/jscl-project/jscl) - A CL-to-JS compiler designed to be self-hosting from day one. Lacks CLOS, format and loop.
⟡ CL-JavaScript (http://marijnhaverbeke.nl/cl-javascript/) - A translator from Javascript to Common Lisp. Not available on Quicklisp. Expat 14 .
⟡ parse-js (http://marijnhaverbeke.nl/parse-js/) - A package for parsing ECMAScript 3. zlib 33 .
⟡ remote-js (https://github.com/ceramic/remote-js) - send JavaScript from Common Lisp to a browser. MIT 200 .
⟡ sigil (https://github.com/BnMcGn/sigil) - A Parenscript to Javascript command line compiler and REPL. MIT 200 .
In development:
⟡ Valtan (https://github.com/cxxxr/valtan) - Common Lisp to JavaScript compiler.
⟡ JACL (https://tailrecursion.com/JACL/) - an experimental Lisp system for the Web browser platform to explore new techniques for developing large Single Page Applications with Lisp.
Utilities for React:
⟡ cl-react (https://github.com/helmutkian/cl-react) - Common Lisp (Parenscript) utilities for building web apps in ReactJs. MIT.
⟡ Panic (https://github.com/michaeljforster/panic), a Parenscript library for React. Not in Quicklisp. MIT 200 . Its TodoMVC example (https://github.com/40ants/todomvc/blob/common-lisp-example/examples/common-lisp-react/src/app.lisp).
⟡ Parenscriptx (https://github.com/jasom/parenscriptx) - Parenscript Macros to aid generating react code. MIT 200 .
⟡ jscl-react (https://github.com/nilesr/jscl-react) - A web framework for writing react components in common lisp using jscl. No license specified.
See also:
⟡ trident-mode (https://github.com/johnmastro/trident-mode.el), an Emacs minor mode for live Parenscript interaction.
Deployment
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ 👍 deploy (https://shinmera.github.io/deploy) - A toolkit for binary deployment of Lisp applications, with extra support for foreign shared libraries. zlib 33 .
⟡ common-lisp-heroku-example (https://github.com/fstamour/common-lisp-heroku-example) - Example of Common Lisp server on Heroku using Docker.
⟡ cube (https://github.com/xh4/cube) - Kubernetes client library for Common LISP generated from the Swagger specification. MIT 200 .
⟡ s2i-lisp (https://github.com/container-lisp/s2i-lisp) - Source-to-Image builder image based on CentOS or alternatively RHEL7 for building Common LISP images for OpenShift (and also Docker). It features an up-to-date SBCL with 
Quicklisp installation, SLIME or SLY integration and allows customization via environment variables. Apache2 89 
⟡ cl-aws-runtime-test (https://github.com/y2q-actionman/cl-aws-custom-runtime-test) - An example of using Common Lisp (SBCL) as a custom runtime on AWS lambda. WTFPL.
⟡ 40ants/ci (https://github.com/40ants/ci/) - Highly opionated Github Actions workflow builder for Common Lisp projects.
  ⟡ with: a linter, lisp critic, tests runner, test matrix, doc building, caching…
⟡ make-common-lisp-program (https://github.com/melusina-org/make-common-lisp-program/) - GitHub action to build an executable Common Lisp program on Ubuntu, MacOS and Windows. MIT.
See also:
- Platform.sh (https://platform.sh/blog/2019/lisp/) has Common Lisp support, so has OVH (https://docs.ovh.com/ie/en/web-paas/languages-lisp/) through their Web PaaS partnership.
- Heliohost (https://www.heliohost.org/) for a free hosting solution.
- Cloud Init file for SBCL (https://git.sr.ht/%7Emarcuskammer/cloudinit/tree/main/item/sbcl-nginx.yml) - an init file for providers supporting the cloudinit format (DigitalOcean etc).
Monitoring
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ prometheus.cl (https://github.com/deadtrickster/prometheus.cl) - Prometheus.io client. Grafana dashboard for SBCL and Hunchentoot metrics (memory, threads, requests per second,…). MIT 200 .
  ⟡ prometheus-g (https://github.com/40ants/prometheus-gc) - Extension for prometheus.cl which collects metrics about garbage collector state.
⟡ cl-sentry-client (https://github.com/mmontone/cl-sentry-client) - a Sentry client for Common Lisp, the cloud-based error monitoring system. MIT 200 .
⟡ rollbar.lisp (https://github.com/adventuring/rollbar.lisp) - interface to Rollbar.com (https://rollbar.com/), an error tracking software.
Websockets
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ 👍 usocket (https://github.com/usocket/usocket) - A portable TCP and UDP socket interface. Expat 14 .
⟡ Portal (https://github.com/charJe/portal) - Portable websockets for Common Lisp, using usocket. LLGPL 8 .
⟡ clws (https://github.com/3b/clws) - websockets server in CL, built on IOlib and libfixposix. No licence specified.
⟡ Hunchensocket (https://github.com/joaotavora/hunchensocket) - RFC6455 compliant WebSockets for Common Lisp, as an extension to Hunchentoot. MIT 200 .
⟡ websocket-driver (https://github.com/fukamachi/websocket-driver) - based on Clack.
⟡ iolib (https://github.com/sionescu/iolib) - I/O library. Expat 14 .
  ⟡ "IOlib is to be a better and more modern I/O library than the standard Common Lisp library. It contains: a socket library, a DNS resolver, an I/O multiplexer, a pathname library and file-system utilities."
Editor's note: at the time of writing, it seems we don't have a full-featured websocket implementation for Common Lisp. We can however recommend Portal, and we invite you to double-check the current issues of Hunchensocket and 
websocket-driver.
Web development utilities
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
Assets management
⟡ Rock (https://github.com/eudoxia0/rock) - an asset manager for
 Common Lisp. It's basically a combination of Bower and
 webassets. MIT 200 .
Browser tests
⟡ cl-webdriver-client (https://github.com/copyleft/cl-webdriver-client/) - a binding library to WebDriver (supports Selenium 4.0).
Form handling
⟡ 👍 cl-forms (https://github.com/mmontone/cl-forms) - Web forms handling library for Common lisp. MIT 200 .
User login and password management
⟡ cl-authentic (https://github.com/charJe/cl-authentic) - Password management for Common Lisp (web) applications. LLGPL 8 .
 - safe password storage: cleartext-free, using your choice of hash algorithm through ironclad, storage in an SQL database,
 - password reset mechanism with one-time tokens (suitable for mailing to users for confirmation),
 - user creation optionally with confirmation tokens (suitable for mailing to users),
⟡ mito-email-auth (https://github.com/40ants/mito-email-auth) - Helper to authenticate a website's users by sending them unique code by email.
⟡ cl-cas (https://github.com/fferrere/cl-cas) - A library to help CAS authenticaton (https://apereo.github.io/cas/6.0.x/protocol/CAS-Protocol.html) to Common Lisp web applications. Not in Quicklisp.
  ⟡ cas-middleware (https://github.com/fferrere/cas-middleware) - CAS authenticaton middleware for Caveman.
  ⟡ cas-demo (https://github.com/fferrere/cas-demo) - a demo project.
See also mito-auth and the Hunchentoot and Clack plugins above.
Web project skeletons and generators
⟡ cl-cookieweb (https://github.com/vindarel/cl-cookieweb) - a Cookiecutter template to start a web project. BSD_3Clause 15 . Not in Quicklisp.
  ⟡ Provides a working toy web app with the Hunchentoot web server, easy-routes, Djula templates, styled with Bulma, based on SQLite, with migrations, an example table definition and a test suite using FiveAM.
⟡ make-like (https://github.com/container-lisp/make-like) - an application template builder for LIKE (Lisp In Kubernetes + Emacs) applications. Apache2.0 51 .
  ⟡ Makefile, podman support, GitHub Actions, Prometheus metrics support, TOML-style config.ini, easy-route preconfigured with health-check and more.
⟡ cl-webapp-seed (https://github.com/rajasegar/cl-webapp-seed) - a simple web application boilerplate. Uses Hunchentoot, cl-who, deploys easily to Heroku. MIT 200 .
Others
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ css-lite (https://github.com/paddymul/css-lite) - A CSS grammar. Expat 14 .
⟡ find-port (https://github.com/eudoxia0/find-port) - Programmatically find open ports. MIT 200 .
⟡ cl-wget (https://github.com/cl-wget/cl-wget) - Makes retrieving large files or mirroring entire websites easy. AGPL-3.0 51 .
⟡ trivial-download (https://github.com/eudoxia0/trivial-download) - Download files. MIT 200 .
Email
⟡ trivial-imap (https://github.com/40ants/trivial-imap) - tries to make easy some common cases of working with IMAP servers, like reading emails from the server. A thin wrapper over post-office library (which is a fork of Franz's 
cl-imap). BSD 15 .
⟡ Postmaster (https://github.com/eudoxia0/postmaster) - A simple, easy-to-use SMTP/IMAP library. Expat 14 .
⟡ cl-smtp (https://gitlab.common-lisp.net/cl-smtp/cl-smtp) - CL-SMTP is a simple lisp smtp client.
⟡ sendgrid (https://github.com/vindarel/cl-sendgrid) - send emails with Sendgrid's API. MIT 200 .
⟡ mailgun (https://github.com/40ants/mailgun) - A thin wrapper to post HTML emails through mailgun.com. unlicence 5 .
⟡ cl-ses (https://github.com/CodyReichert/cl-ses/) - Library for AWS SES. Expat 14 .
OpenAPI, OData, OpenRPC
⟡ NEW! openapi-generator (https://codeberg.org/kilianmh/openapi-generator) - OpenAPI client code generator. AGPL-3.0 51 .
  ⟡ Generation of OpenAPI ASDF/Quicklisp-loadable projects within one command,
  ⟡ Support for path, (arbitrary) query, (arbitrary) header, (json) content parameters,
  ⟡ Conversion of an OpenAPI spec into CLOS object -> explore API within inspector,
  ⟡ Conversion of OpenAPI-2.0 or YAML files to OpenAPI-3.0 JSON with swagger converter (network connection required),
  ⟡ etc.
⟡ apispec (https://github.com/cxxxr/apispec) - A Common Lisp library for handling Web API requests and responses. BSD_3Clause 15 .
 - takes an OpenAPI3 yaml specification and allows to validate and parse HTTP request headers, parameters and bodies.
⟡ cl-odata-client (https://github.com/copyleft/cl-odata-client) - Common Lisp client library for accessing OData services (https://www.odata.org). MIT 200 .
⟡ OpenRPC (https://github.com/40ants/openrpc) - OpenRPC implementation for Common Lisp. BSD 15 .
 - Automatic OpenRPC spec generation
 - Automatic JSON-RPC client building by OpenRPC spec. This includes creation of Common Lisp classes and methods for making RPC requests and returning native CL objects.
 - all JSON marshalling is done under the hood.
- jsonrpc (https://github.com/cxxxr/jsonrpc) - JSON-RPC 2.0 server/client for Common Lisp. BSD 15 .
Static site generators
⟡ coleslaw (https://github.com/kingcons/coleslaw) and its
 coleslaw-cli (https://github.com/40ants/coleslaw-cli) - Flexible
 Lisp Blogware similar to Frog, Jekyll, or Hakyll. BSD 15 .
Third-party APIs
⟡ Aws-sign4 (https://github.com/rotatef/aws-sign4) - Common Lisp library for Amazon Web Services signing version 4. GNU GPL3 2 .
⟡ aws-sdk-lisp (https://github.com/pokepay/aws-sdk-lisp/) - Provides interfaces for each AWS services as individual systems. BSD_2Clause 17 .
  ⟡ incluse dozens of services: dsn, appstream, athena, cloudfront, codedeploy, cognito-, directconnect, dynamodb, dms, elasticache, email, events, kinesis, machinelearning, monitoring, s3, sms, storagegateway, workspaces…
⟡ zs3 (https://github.com/xach/zs3) - A library for working with Amazon's Simple Storage
Service (S3) and CloudFront service. BSD 15 .
⟡ north (https://shinmera.github.io/north) - The successor to the South (Simple OaUTH) library, implementing the full oAuth 1.0a protocol, both client and server sides. Using North you can easily become an oAuth provider or consumer. 
zlib 33 .
⟡ Ciao (https://github.com/kjinho/ciao) - an easy-to-use Common Lisp OAuth 2.0 client library. It is a port of the Racket OAuth 2.0 Client to Common Lisp. LGPL3 9 .
⟡ avatar-api (https://github.com/eudoxia0/avatar-api) - Get avatars from Google+, Gravatar and others. Expat 14 .
⟡ chirp (https://github.com/Shinmera/chirp) - A Twitter client library. zlib 33 .
⟡ tooter (https://github.com/Shinmera/tooter) - a client library implementing the full v1 REST API protocol for Mastodon. zlib 33 .
⟡ cl-irc (https://www.common-lisp.net/project/cl-irc/) - An IRC client library. Expat 14 .
⟡ cl-mediawiki (https://github.com/AccelerationNet/cl-mediawiki) - a wrapper around the MediaWiki api. MIT 200 .
⟡ cl-openid (https://github.com/cl-openid/cl-openid) - An implementation of OpenID. LLGPL 8 .
⟡ cl-pushover (https://github.com/TeMPOraL/cl-pushover) - Common Lisp bindings to Pushover. MIT 200 .
⟡ humbler (https://github.com/Shinmera/humbler) - A Tumblr API interface. zlib 33 .
⟡ multiposter (https://github.com/Shinmera/multiposter) - post to multiple services simultaneously. zlib 33 .
⟡ stripe (https://git.mfiano.net/mfiano/stripe) - a client for the Stripe payment system. MIT 200 .
⟡ lisp-pay (https://github.com/K1D77A/lisp-pay) - Wrappers around various payment processors: Paypal, Stripe, Coinpayments and BTCPayServer. MIT 200 .
⟡ lunamech-matrix-api (https://github.com/K1D77A/lunamech-matrix-api) - A complete wrapper over the Client -> Server Matrix API. MIT 200 .
⟡ cl-telegram-bot (https://40ants.com/cl-telegram-bot/) - Telegram bot API. MIT 200 .
  ⟡ cl-telegram-bot-auto-api (https://github.com/aartaka/cl-telegram-bot-auto-api) - Alternative Telegram Bot API bindings, auto-generated from Telegram website. 3-clause BSD 15 .
Numerical and Scientific
========================
⟡ ⭐ maxima (http://maxima.sourceforge.net/) - Computer Algebra System. GNU GPL3 2 .
  ⟡ wxMaxima (https://wxmaxima-developers.github.io/wxmaxima/): a graphical frontend.
  ⟡ Maxima on Android (https://play.google.com/store/apps/details?id=jp.yhonda), built with ECL.
  ⟡ Maxima on Jupyter (https://github.com/robert-dodier/maxima-jupyter)
  ⟡ it can be used via SageMath (https://www.sagemath.org/) and KDE Cantor (https://apps.kde.org/cantor/). Of course, with Emacs: maxima-mode (https://gitlab.com/sasanidas/maxima) (screenshot 
(https://community.linuxmint.com/img/screenshots/maxima-emacs.png)) and maxima-interface (https://github.com/jmbr/maxima-interface) to ease the interface between Maxima and Common Lisp.
  ⟡ it can be used from a Lisp REPL (https://mahmoodsheikh36.github.io/post/20230510181916-maxima_in_lisp/).
⟡ numcl (https://github.com/numcl/numcl) - Numpy clone in Common Lisp. LGPL3 9 .
⟡ GSLL (https://common-lisp.net/project/gsll/) - GNU Scientific Library for Lisp; allows the use of the GSL from Common Lisp. GNU LGPL2.1 11 .
⟡ Xecto (https://github.com/pkhuong/Xecto) - A library for regular array parallelism. 3-clause BSD 15 .
⟡ Petalisp (https://github.com/marcoheisig/Petalisp) - an attempt to
 generate high performance code for parallel computers by
 JIT-compiling array definitions. It works on a more
 fundamental level than NumPy, by providing even more powerful
 N-dimensional arrays, but just a few building blocks for working on
 them. AGPL-3.0 agpl3 .
⟡ cl-ana (https://github.com/ghollisjr/cl-ana) - Common Lisp data analysis library with emphasis on modularity and conceptual clarity. It aims to be a general purpose framework for analyzing small and large scale datasets, including 
binned data analysis and visualization. GNU GPL3 2 .
⟡ avm (https://github.com/takagi/avm) - Efficient and expressive arrayed vector math library with multi-threading and CUDA support. MIT 200 .
⟡ array-operations (https://github.com/bendudson/array-operations) - a collection of functions and macros for manipulating Common Lisp arrays and performing numerical calculations with them. MIT 200 .
⟡ cl-geometry (https://github.com/Ramarren/cl-geometry/) - a system for two dimensional computational geometry for Common Lisp. MIT 200 .
⟡ Vellum (https://github.com/sirherrbatka/vellum) - Data Frames for Common Lisp. BSD_2Clause.
⟡ rtg-math (https://github.com/cbaggers/rtg-math/) - a selection of the math routines most commonly needed for making realtime graphics in lisp (2, 3 and 4 component vectors, 3x3 and 4x4 matrices, quaternions, spherical and polar 
coordinates). BSD_2Clause.
⟡ origin (https://github.com/mfiano/origin) - A native Lisp graphics math library with an emphasis on performance and correctness. Includes: vectors, matrices (up to 4x4), quaternions, single/double-float support, 
destructive/non-destructive operations, shaping & intersections. MIT 200 .
Planning solvers:
⟡ linear-programming (https://neil-lindquist.github.io/linear-programming/) – a library for solving linear programming problems. MIT 200 .
⟡ shop3 (https://github.com/shop-planner/shop3) - a Hierarchical Task Network (HTN) AI planner. Mozilla Public License.
NEW! If you have precise needs, blurry needs or simply questions, the repository Common Lisp numsci call for needs (https://github.com/digikar99/common-lisp-numsci-call-for-needs) is a new place to discuss them.
Matrix libraries
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ magicl (https://github.com/quil-lang/magicl) - Matrix Algebra proGrams In Common Lisp based on BLAS/LAPACK and Expokit, by Rigetti Computing. BSD_3Clause 15 .
⟡ lisp-matrix (https://github.com/blindglobe/lisp-matrix) - A matrix package. FreeBSD 39 .
⟡ 3d-matrices (https://shinmera.github.io/3d-matrices) - A library implementing common matrix calculations, with an emphasis on 2x2,3x3, and 4x4 matrices as commonly used in graphics. It provides some numerical functions as well, but 
those are not the focus. The library is heavily optimised, so it is not made of pretty code. zlib 33 .
⟡ clem (https://github.com/slyrus/clem) - a matrix library. BSD_2Clause 17 .
Statistics
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ 👍 lisp-stat (https://github.com/lisp-stat) - an environment for statistical computing, conceptually similar to R, that is also suitable for front-line production deployments. "It grew out of a desire to have an environment for 
rapidly prototyping analytical and A.I. solutions, and move directly to production environments with minimal friction."
  ⟡ https://lisp-stat.dev/
  ⟡ inspired by Luke Tierney's XLisp-Stat (https://homepage.stat.uiowa.edu/~luke/xls/xlsinfo/) (a predecessor of R), ships a compatibility library for it, otherwise builds on other and newer libraries.
See also common-lisp-stat (https://github.com/blindglobe/common-lisp-stat/), Common Lisp statistics library. FreeBSD 39 , staling.
Units
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ physical-quantities (https://github.com/mrossini-ethz/physical-quantities) - a library that provides a numeric type with optional unit and/or uncertainty for computations with automatic error propagation. GPL2
Utils
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ cmu-infix (https://github.com/rigetti/cmu-infix) - A library for writing infix mathematical notation in Common Lisp. See also polisher (https://github.com/mrcdr/polisher).
Parallelism and Concurrency
===========================
⟡ ⭐ BordeauxThreads (https://common-lisp.net/project/bordeaux-threads/) - Portable, shared-state concurrency. Expat 14 .
⟡ ⭐ lparallel (https://github.com/sharplispers/lparallel) - A library for parallel programming. 3-clause BSD 15 . Originally on lmj/lparallel (https://github.com/lmj/lparallel).
⟡ lfarm (https://github.com/lmj/lfarm) - distributing work across machines (on top of lparallel and usocket). BSD_3Clause 15 
⟡ calispel (https://github.com/hawkir/calispel) - CSP (https://en.wikipedia.org/wiki/Communicating_sequential_processes)-like channels for common lisp. With blocking, optionally buffered channels and a "CSP select" statement. ISC-style.
 - "It is complete, flexible and easy to use. I would recommend Calispel over Lparallel and ChanL." @Ambrevar. discussion (https://github.com/CodyReichert/awesome-cl/issues/290)
⟡ chanl (https://github.com/zkat/chanl) - Portable, channel-based concurrency. Expat 14 , with parts under 3-clause BSD 15 .
⟡ cl-async (https://github.com/orthecreedence/cl-async) - A library for general-purpose, non-blocking programming. Expat 14 .
⟡ Moira (https://github.com/TBRSS/moira) - Monitor and restart background threads. In-lisp process supervisor. MIT 200 .
⟡ trivial-monitored-thread (https://gitlab.com/ediethelm/trivial-monitored-thread) -
 a Common Lisp library offering a way of spawning threads and being
 informed when one any of them crash and die. MIT 200 .
⟡ cl-gearman (https://github.com/taksatou/cl-gearman) - a library for the Gearman (https://github.com/gearman/gearmand/) distributed job system. LLGPL 8 .
⟡ swank-crew (https://github.com/brown/swank-crew) - distributed computation framework implemented using Swank Client. BSD_3Clause 15 .
⟡ cl-coroutine (https://github.com/takagi/cl-coroutine) - a coroutine library. It uses the CL-CONT continuations library in its implementation. MIT 200 .
⟡ STMX (https://github.com/cosmos72/stmx) - High performance Transactional Memory for Common Lisp. LLGPL 8 .
⟡ Blackbird (https://orthecreedence.github.io/blackbird/) - a Promise implementation for Common Lisp MIT 200 .
  ⟡ see also promise (https://github.com/Shinmera/promise) - a basic promise datastructure, with timeouts. ZLIB.
See also:
⟡ cl-etcd (https://github.com/atgreen/cl-etcd) - Run etcd as an asynchronous inferior process. etcd (https://etcd.io/) is a strongly consistent, distributed key-value store. AGPL-3.0 agpl3 .
Actors pattern
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ 👍 Sento (https://github.com/mdbergmann/cl-gserver) - Sento (formerly cl-gserver) is a 'message passing' library/framework with actors similar to Erlang or Akka. It supports creating systems that should work reactive, require parallel
computing and event based message handling. Apache2 89 .
⟡ erlangen (https://github.com/eugeneia/erlangen) - Distributed, asynchronous message passing system for Clozure Common Lisp. GNU GPL3 2 .
⟡ Actors (https://github.com/aarvid/Actors) package for LispWorks (announce (https://www.reddit.com/r/Common_Lisp/comments/77vsft/david_mcclains_actors_package_for_lispworks/)) MIT 200 .
⟡ common-lisp-actors (https://github.com/naveensundarg/Common-Lisp-Actors) - a simple and easy to use Actor system. BSD_2Clause 17 .
⟡ memento-mori (https://github.com/zkat/memento-mori)- a library for writing robust, actor-based systems. It draws inspiration from Erlang/OTP, particularly its crash-first approach to high-availability systems, as well as Akka. MIT 
200 .
See also:
⟡ lisp-actors (https://github.com/dbmcclain/Lisp-Actors), an "ongoing investigation into the use of the Actor model in Common Lisp, which has had the benefit of real-world application".
  ⟡ it was part of the Emotiq blockchain (https://github.com/emotiq/emotiq/blob/dev/src/test/blockchain-test.lisp) (a discontinued project)
  ⟡ does remoting, includes a threading abstraction layer library similar to Bordeaux-Threads.
  ⟡ ! it lacks unit tests.
Event processing
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ simple-tasks (https://github.com/Shinmera/simple-tasks) - A very simple task scheduling framework. zlib 33 .
⟡ deeds (https://github.com/Shinmera/deeds) - Deeds is an Extensible Event Delivery System. It allows for efficient event delivery to multiple handlers with a complex event filtering system. zlib 33 .
⟡ cl-flow (https://github.com/borodust/cl-flow/) - Data-flowish computation tree library for non-blocking concurrent Common Lisp. MIT 200 .
⟡ event-glue (https://github.com/orthecreedence/event-glue) - simple eventing abstraction. No dependencies. It can be used anywhere you need a generic event handling system. MIT 200 .
Job processing
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ SBCL's timers (http://www.sbcl.org/manual/#Timers), system-wide event schedulers.
⟡ psychiq (https://github.com/fukamachi/psychiq) - redis-based background job processing for Common Lisp applications. Inspired by Ruby's Sidekiq and compatible with its web UI. LLGPL 8 .
⟡ cl-cron (https://github.com/ciel-lang/cl-cron) - A simple tool that provides cron like facilities. GPL3 2 .
⟡ clerk (https://github.com/tsikov/clerk) - a cron-like scheduler with sane DSL. MIT 200 .
Regex
=====
⟡ ⭐ cl-ppcre (http://weitz.de/cl-ppcre/) - Portable, Perl-compatible regular expressions. FreeBSD 39 .
⟡ one-more-re-nightmare (https://github.com/no-defun-allowed/one-more-re-nightmare) - a fast-ish regular expression compiler in Common Lisp. BSD_2Clause 17 .
See also clj-re above.
Scripting
=========
Writing, running scripts
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ 👍 Roswell (https://github.com/roswell/roswell#scripting-with-roswell) -
 a lisp installer and scripting environment (helper, launcher,
 installer) and more. MIT 200 .
⟡ cl-all (https://github.com/shinmera/cl-all) - A script to run Lisp snippets in multiple implementations. This allows you to quickly compare implementation behaviour and differences. zlib 33 .
⟡ clawk (https://github.com/sharplispers/clawk) - an AWK implementation embedded into Common Lisp, to search files for lines and perform specified actions on its fields. BSD-style.
⟡ ScriptL (https://github.com/rpav/ScriptL) - Shell scripting made Lisp-like! Or, live-coding remote function calls for the shell. Write a command in the REPL, and run it instantly in the shell. LLGPL 8 .
  ⟡ similar and maybe simpler: lserver (https://notabug.org/quasus/lserver/)
Command-line options parsers
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ 👍 Clingon (https://github.com/dnaeon/clingon) - a rich command-line options parser system.
  ⟡ it may have the richest feature set: subcommands, generation of bash completion, support for various kinds of options (integers, booleans, counter, enums…), extensible…
⟡ Adopt (https://github.com/sjl/adopt/) - A Damn OPTion parsing library. MIT 200 .
Readline, ncurses and other graphical helpers
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ cl-readline (https://github.com/vindarel/cl-readline) - a set of
 functions to edit lines as they are typed in, to maintain a list of
 previously-entered command lines, to recall and reedit them and
 perform csh-like history expansion. Emacs and vi editing
 modes. GPL3 2 .
⟡ Linedit (https://common-lisp.net/project/linedit) - Readline-style
 library that provides customizable line-editing
 features. MIT-style 210 .
⟡ cl-charms (https://github.com/HiTECNOLOGYs/cl-charms) - an
 interface to libcurses in Common Lisp. It provides both a raw,
 low-level interface to libcurses via CFFI, and a more higher-level
 lispier interface. MIT 200 .
⟡ replic (https://github.com/vindarel/replic/) - helpers to turn existing code into a readline application, with a focus on defining the completion of the commands' arguments. Also comes as a ready to use executable, that transforms a 
user's lispy init file into readline commands. MIT 200 .
⟡ cl-ansi-term (https://github.com/vindarel/cl-ansi-term) - print
 colorized text, horizontal lines, progress bars, (un)ordered lists
 and tables on ANSI-compliant terminals. GPL3 2 .
⟡ cl-progress-bar (https://github.com/sirherrbatka/cl-progress-bar/) - progress bars, just like in Quicklisp ! MIT 200 .
Shells, shells interfaces
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ Lish (https://github.com/nibbula/lish) - lish may someday be a lisp shell. GPL3 2 .
  ⟡ supports tab-completion of executables in the path and Lisp symbols, allows to write and to mix shell commands and Lisp code, has a tiny REPL and an interactive debugger, and more.
⟡ shcl (https://github.com/bradleyjensen/shcl) - a POSIX-like shell in Common Lisp. Apache2.0 89 .
⟡ Shelly (https://github.com/fukamachi/shelly) - execute Common Lisp
 functions like a shell command, without the need to write a command
 line arguments parser. And it also can be used as a Make-like
 build-tool. FreeBSD 39 .
⟡ unix-in-lisp (https://github.com/PuellaeMagicae/unix-in-lisp) - Mount Unix system into Common Lisp image.
  ⟡ Unix concepts are directly/shallowly embedded into Lisp (Unix commands become Lisp macros, Unix file become Lisp variables, Unix streams become lazy Lisp sequences, etc).
Lisp utilities:
⟡ cmd (https://github.com/ruricolist/cmd) - utility for running external programs. Protects against shell interpolation, built with multi-threaded programs in mind, Windows support. MIT 200 .
  ⟡ uiop:run-program (synchronous) and uiop:launch-program (async) are shipped with ASDF and available on all modern implementations. See the CL Cookbook: running external programs 
(https://lispcookbook.github.io/cl-cookbook/os.html#running-external-programs).
⟡ Clesh (https://github.com/Neronus/Clesh) - extends Common Lisp to embed shell code in a manner similar to perl's backtick. FreeBSD 39 .
System administration
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ Consfigurator (https://spwhitton.name/tech/code/consfigurator/) - Lisp declarative configuration management system. You can use it to configure hosts as root, deploy services as unprivileged users, build and deploy containers, and 
produce disc images. GPL3 2 .
⟡ cl-unix-cybernetics (https://github.com/cl-unix-cybernetics/cl-unix-cybernetics) (previously Adams) - UNIX system administration in Common Lisp. Not unlike Ansible, Chef or Puppet. ISC 22 .
 - You describe your systems (hosts) using resources having properties. The properties are then probed and synchronized using only /bin/sh on the remote host, and /usr/bin/ssh on the control host.
Other scripting utilities
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ WCL (https://github.com/wadehennessey/wcl) stalled - allow hundreds of Lisp
applications to be realistically available at once, while allowing
several of them to run concurrently. WCL accomplishes this by
providing Common Lisp as a Unix shared library that can be linked with
Lisp and C code to produce efficient applications. For example, the
executable for a Lisp version of the canonical Hello World!
program requires only 20k bytes on 32 bit x86 Linux. WCL also
supports a full development environment, including dynamic file
loading and debugging. A modified version of GDB is used to debug WCL
programs, providing support for mixed language debugging.
- a **paper** (https://dl.acm.org/doi/abs/10.1145/141478.141560): "Delivering efficient Common Lisp applications under Unix".
Text Editor Resources
=====================
This contains plugins and other goodies for various text editors.
⟡ Parinfer (https://shaunlebron.github.io/parinfer/) - Parinfer is a way to edit lisp code that helps to keep both the indentation and the parenthesis balanced. It is easy to start with and yet it offers advanced features à la Paredit. 
It is available on many editors (Emacs, Vim, Neovim, Atom, Sublime Text, Visual Studio Code, LightTable, CodeMirror,…).
Emacs ##
⟡ ⭐ Slime (https://github.com/slime/slime) - Superior Lisp Interaction Mode for Emacs; a full-blown environment for Common Lisp inside of Emacs. Public domain.
⟡ 👍 Sly (https://github.com/joaotavora/sly) - SLY is a fork of SLIME and contains multiple improvements upon it, such as Sly stickers.
Starter kits:
⟡ 👍 Portacle (https://shinmera.github.io/portacle/) - A portable and multiplatform Common Lisp environment: SBCL, Quicklisp, Emacs, Slime, Git.
⟡ Emacs4CL (https://github.com/susam/emacs4cl) - A tiny Emacs initialization file to quickly set up vanilla Emacs for Common Lisp programming. Comes with a line-by-line explanation of every line of code in the initialization file.
⟡ plain-common-lisp (https://github.com/pascalcombier/plain-common-lisp/) - A trivial way to get a native Common Lisp environment on Windows.
  ⟡ ships SBCL, Quicklisp, Emacs and Slime.
  ⟡ with example programs for a console program, accessing the Win32 API, displaying a GUI with IUP, running an OpenGL window.
⟡ cl-devel2 (https://hub.docker.com/r/eshamster/cl-devel2/) - a Docker container for Common Lisp development environment. Ships SBCL, CCL, Roswell and Emacs25 with Slime.
Slime extensions:
⟡ slime-star (https://github.com/mmontone/slime-star) - a SLIME configuration with extensions pre-installed, with also some custom utilities and menus:
 - the Lisp system browser
 - SLIME doc contrib (https://github.com/mmontone/slime-doc-contribs) - enhance the default help buffer.
 - Quicklisp systems (https://github.com/mmontone/quicklisp-systems) - Search, browse and load Quicklisp systems from Emacs.
 - Quicksearch (https://github.com/tkych/quicksearch)
 - Slime breakpoints (https://github.com/mmontone/slime-breakpoints)
 - Slite (https://github.com/tdrhq/slite/) - a test runner for FiveAM.
 - Quicklisp-apropos (https://github.com/mmontone/quicklisp-apropos) - Perform apropos queries across libraries in Quicklisp (full-text search on symbol names, classes, documentation…).
 - slime-critic (https://github.com/mmontone/slime-critic) - the lisp critic gently critiques your code for bad patterns.
Sly extensions:
⟡ sly-overlay (https://git.sr.ht/~fosskers/sly-overlay) - an extension for Sly that enables the overlay of Common Lisp evaluation results directly into the buffer in the spirit of CIDER (Clojure), Eros (Emacs Lisp) and the Lem editor.
Vim & Neovim ##
⟡ SLIMV (https://github.com/kovisoft/slimv) - Superior Lisp Interaction Mode for Vim; a full-blown environment for Common Lisp inside of Vim. No license specified.
⟡ Vlime (https://github.com/vlime/vlime) - VLIME: Vim plus Lisp Is Mostly Evil. A Common Lisp dev environment for Vim (and Neovim). MIT 200 .
⟡ quicklisp.nvim (https://gitlab.com/HiPhish/quicklisp.nvim) - A Quicklisp frontend for Neovim.
⟡ Slimv_box (https://github.com/justin2004/slimv_box) - slimv in a Docker container.
Eclipse ##
⟡ Dandelion (https://github.com/Ragnaroek/dandelion) - a Common Lisp plugin for the Eclipse IDE.
Lem ##
⟡ Lem (https://github.com/lem-project/lem) - a ready to use, Emacs-like, Slime-based
 editor tailored for Common Lisp development out of the box, as well as other programming languages with its built-in LSP client. With ncurses, Electron and SDL2 interfaces. MIT 200 .
  ⟡ Lem 2.0 (https://github.com/lem-project/lem/releases/tag/v2.0.0), released on May, 2023, added the SDL2 frontend, thus mouse support, graphic capabilities and Windows support, among other new features.
  ⟡ see also: an opengl frontend (https://github.com/pupcraft/lem-opengl), Lem in Docker (https://github.com/40ants/lem-docker), lem-pareto (https://github.com/40ants/lem-pareto).
Atom, Pulsar ##
⟡ SLIMA (https://github.com/neil-lindquist/slima) allows you to
 interactively develop Common Lisp code, turning Atom (or now Pulsar) into a
 pretty good, and actively developped, Lisp IDE. MIT 200 .
Sublime Text ##
⟡ Sublime Text (http://www.sublimetext.com/3) (proprietary) has
 Common Lisp support with its SublimeREPL and
 Slyblime (https://github.com/s-clerc/slyblime) packages. Slyblime
 is an implementation of SLY and it uses the same backend (SLYNK). It
 ships advanced features including a debugger with stack frame
 inspection.
VSCode ##
⟡ commonlisp-vscode (https://marketplace.visualstudio.com/items?itemName=ailisp.commonlisp-vscode) - an extension to support syntax highlight, auto completion, documentation on hover, go to definition, compile & load file, REPL. It is 
On GitHub (https://github.com/ailisp/commonlisp-vscode/).
⟡ alive (https://github.com/nobody-famous/alive) - Common Lisp Extension for VSCode. Public domain.
  ⟡ see the Cookbook: using VSCode with Alive (https://lispcookbook.github.io/cl-cookbook/vscode-alive.html)
⟡ strict-paredit-vscode (https://marketplace.visualstudio.com/items?itemName=ailisp.strict-paredit) - structural editing and navigation like Emacs.
JetBrains
⟡ SLT (https://github.com/Enerccio/SLT) - an IDE Plugin for Itellij/Jetbrains IDE lineup implementing support for Common Lisp via SBCL and Slime/Swank.
 - 🎉 NEW! Released in Jan, 2023.
Geany (experimental) ##
⟡ Geany-lisp (https://github.com/jasom/geany-lisp) is an experimental lisp mode for the Geany (https://geany.org/) editor.
Notebooks ##
⟡ common-lisp-jupyter (https://github.com/yitzchak/common-lisp-jupyter) - A Common Lisp kernel for Jupyter along with a library for building Jupyter kernels, based on Maxima-Jupyter by Robert Dodier which was based on cl-jupyter by 
Frederic Peschanski. MIT 200 .
  ⟡ jupyterlab-debugger-restarts (https://github.com/yitzchak/jupyterlab-debugger-restarts) - restart functionality for the JupyterLab debugger.
  ⟡ Cytoscape widget (https://github.com/yitzchak/cytoscape-clj) - Cytoscape.js widget for common-lisp-jupyter.
  ⟡ Kekule widget (https://github.com/yitzchak/kekule-clj) - Kekule.js widget for common-lisp-jupyter.
  ⟡ molecule viewer (https://github.com/yitzchak/jupyterlab-molviewer) - A molecule viewer for JupyterLab using ngl.
  ⟡ ngl widget (https://github.com/yitzchak/ngl-clj) - A ngl widget (protein viewer) for common-lisp-jupyter.
  ⟡ sheet widget (https://github.com/yitzchak/sheet-clj) - Data grid widget for common-lisp-jupyter.
⟡ cl-jupyter (https://github.com/fredokun/cl-jupyter) - A Common Lisp kernel for Jupyter notebooks custom licence (https://github.com/fredokun/cl-jupyter/blob/master/LICENSE).
⟡ Darkmatter (https://github.com/tamamu/darkmatter) - A
 notebook-style Common Lisp environment. MIT 200 .
REPLs ##
⟡ cl-repl (https://github.com/lisp-maintainers/cl-repl) - an ipython-like REPL. With completion, shell commands, magic commands, debugger, etc. GPL3 2 . With colorthemes (https://github.com/koji-kojiro/lem-pygments-colorthemes).
  ⟡ new as of 2024: it now provides multi-line input and binary releases. Simply download a binary (Ubuntu so far) and run it.
⟡ sbcli (https://github.com/hellerve/sbcli) - a readline REPL for SBCL. With completion, quick commands, optional syntax highlighting (with pygments), and no interactive debugger. GPL3 2 .
⟡ magic-ed (https://github.com/sanel/magic-ed) - a tiny editing facility, where you can directly load, edit, manipulate and evaluate file or file content from the REPL, when going to a full IDE is too much. MIT 200 .
Online editors ##
⟡ Judge0 IDE (https://ide.judge0.com/?lUpj) is an online editor which supports Common Lisp (SBCL). MIT 200 .
⟡ Riju (https://riju.codes/commonlisp), a "fast online playground for every programming language", supports Common Lisp (SBCL).
Apps ##
⟡ CodePlayground (https://codeplayground.app/) - an iPhone and iPad app with Lisp support via CCL.
Text and binary parsers
============================
⟡ ⭐ esrap (https://github.com/scymtym/esrap) - Packrat parser. Expat 14 .
⟡ alexa (https://github.com/quil-lang/alexa) - A Lexical Analyzer Generator. BSD_3Clause 15 .
 - ALEXA is a tool similar to lex or flex for generating lexical analyzers. Unlike tools like lex, however, ALEXA defines a domain-specific language within your Lisp program, so you don't need to invoke a separate tool.
⟡ cl-yacc (https://github.com/jech/cl-yacc) - a LALR(1) parser generator. MIT 200 .
⟡ cl-shlex (https://github.com/ruricolist/cl-shlex/) - simple lexical analyzer for shell-like syntaxes. MIT 200 .
⟡ smug (https://github.com/drewc/smug) - parser combinators for Common Lisp. SMUG makes it simple to create quick extensible recursive descent parsers without funky syntax or impenetrable macrology. MIT 200 .
⟡ parseq (https://github.com/mrossini-ethz/parseq) - a library for parsing sequences such as strings and lists using parsing expression grammars. Inspired by Esrap. GPL2.
⟡ lisp-binary (https://github.com/j3pic/lisp-binary) - A library to easily read and write complex binary formats. GPL3 2 .
⟡ uclp (https://github.com/ravi-delia/uclp) - An experimental implementation of parsing expression grammars (PEGs, a la Janet) in Common Lisp. MIT.
see also:
⟡ texp (https://github.com/eugeneia/texp/) - A DSL to generate TeX. AGPL-3.0 agpl3 .
Text Processing
===============
⟡ montezuma (https://github.com/sharplispers/montezuma/) - Full-text indexing and search for Common Lisp. Expat 14 .
⟡ mk-string-metrics (https://github.com/cbaggers/mk-string-metrics) -
 Calculate various string metrics efficiently in Common Lisp
 (Damerau-Levenshtein, Hamming, Jaro, Jaro-Winkler, Levenshtein,
 etc). MIT 200 .
⟡ wiki-lang-detect (https://github.com/vseloved/wiki-lang-detect) -
Text language identification using Wikipedia data. No license specified.
⟡ cl-phonetic (https://github.com/bgutter/cl-phonetic) - Phonetic pattern matching library for Common Lisp (intended to replace the Sylvia library for Python). MIT 200 .
⟡ cl-string-generator (https://github.com/pokepay/cl-string-generator) - Generate string from regular expression. MIT 200 .
⟡ trivial-sanitize (https://notabug.org/cage/trivial-sanitize) - clean html strings: "" → "foo". LLGPL 8 .
See also:
⟡ Resolve (https://github.com/GrammaTech/resolve) - A software for AST-based diff calculation, display, and automated resolution. Written in C++ and CL, you'll find Lisp utilities.
Tools
=====
These are applications or bits of code that make development in Common Lisp easier without being Common Lisp libraries themselves.
⟡ quicksearch (https://github.com/tkych/quicksearch) - Look up online libraries from the REPL. Expat 14 .
⟡ lake (https://github.com/takagi/lake) - a GNU make like build utility. MIT 200 .
Unit Testing
============
⟡ ⭐ FiveAM (https://github.com/sionescu/fiveam) - Simple regression testing framework. FreeBSD 39 .
  ⟡ fiveam-matchers (https://github.com/tdrhq/fiveam-matchers/) - an extensible, composable matchers library for fiveam. Apache2.0 89 .
⟡ CLUnit2 (https://notabug.org/cage/clunit2/) - A unit testing library. MIT 200 .
⟡ Parachute (https://github.com/Shinmera/parachute) - An extensible and cross-compatible testing framework. With test dependencies, conditions, fixtures and restarts. zlib 33 .
⟡ Mockingbird (https://github.com/Chream/mockingbird) - A small
 stubbing and mocking library for Common Lisp. Can also check wether
 a stubbed function was called, how many times and with which
 arguments. MIT 200 .
⟡ cl-mock (https://github.com/Ferada/cl-mock) - Another mocking library. It has more features than Mockingbird, like pattern matching on the mocked call, etc.
⟡ Check-it (https://github.com/DalekBaldwin/check-it) - A QuickCheck-style randomized property-based testing. LLGPL 8 .
⟡ cl-coveralls (https://github.com/fukamachi/cl-coveralls) - a helper
 library to post test coverage to Coveralls. See SBCL's code coverage tool (http://www.sbcl.org/manual/index.html#sb_002dcover). FreeBSD 39 .
⟡ CheckL (https://github.com/rpav/CheckL/) - Why write programs in Common Lisp but tests like Java? Meet CheckL!
  ⟡ a testing library that checks the current test value against the previous one and offers restarts.
See also:
⟡ testieren (https://cicadas.surf/cgit/colin/testiere.git/about/) - a testing utility where tests are included at the top of a defun/t form. They are run when you recompile your functions interactively. With mocking and stubbing 
support. GPL3 2 .
Editor utilities:
⟡ Slite (https://github.com/tdrhq/slite/) - a SLIme-based TEst runner for FiveAM Tests. Apache2.0 89 
 - Slite interactively runs your Common Lisp tests (at the time of writing only FiveAM is supported). It allows you to see the summary of test failures, jump to test definitions, rerun tests with the debugger, all from inside Emacs.
For more: Sabra Crolleton's extensive test frameworks comparison (https://sabracrolleton.github.io/testing-framework).
Utilities
=========
Caching
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ clache (https://github.com/html/clache) - General caching facility. Cache any Lisp object on disk or in memory. A cache can be persistent or have an expiration time. LLGPL 8 .
⟡ function-cache (https://github.com/AccelerationNet/function-cache) - A Common Lisp function caching / memoization library. BSD 15 .
Compression / decompression
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ chipz (https://github.com/froydnj/chipz) - A decompression library. 3-clause BSD 15 .
⟡ Salza2 (http://www.xach.com/lisp/salza2/) - A library for creating compressed data. FreeBSD 39 .
⟡ zippy (https://github.com/Shinmera/zippy) - A ZIP archive format library based on 3bz. zlib 33 .
⟡ archive (https://github.com/froydnj/archive) - a library for reading and creating archive (tar, cpio) files. BSD_3Clause 15 . A pure Common Lisp replacement for the tar program.
  ⟡ see its recent fork cl-tar (https://common-lisp.net/project/cl-tar/) (2021). Announce (https://www.timmons.dev/posts/new-project-cl-tar.html).
Configuration
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ 👍 py-configparser (https://common-lisp.net/project/py-configparser/) - reads and writes Python's ConfigParser-like configuration files. MIT 200 .
⟡ envy (https://github.com/fukamachi/envy) - Configuration switcher. FreeBSD 39 .
⟡ chameleon (https://github.com/sheepduke/chameleon/) - a configuration management library shipped with profile support. MIT 200 .
CSV
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ ⭐ cl-csv (https://github.com/AccelerationNet/cl-csv) - A library for parsing CSV files. 3-clause BSD 15 .
⟡ cl-decimals (https://github.com/tlikonen/cl-decimals) - Decimal number parser and formatter. Public domain.
⟡ auto-text (https://github.com/defunkydrummer/auto-text) - automatic (encoding, end of line, column width, csv delimiter etc) detection for text files. MIT 200 . See also inquisitor (https://github.com/t-sin/inquisitor) for detection 
of asian and far eastern languages.
⟡ csv-validator (https://github.com/KoenvdBerg/csv-validator) - Validates tabular CSV data using predefined validations, inspired from its Python homologue "Great Expectations". BSD_3Clause 15 .
Date and time
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ ⭐ local-time (https://common-lisp.net/project/local-time/) - A development library for manipulating date and time information in a semi-standard manner. 3-clause BSD 15 .
⟡ fuzzy-dates (https://github.com/Shinmera/fuzzy-dates) - A library to fuzzily parse date and time strings. Zlib.
⟡ cl-date-time-parser (https://github.com/tkych/cl-date-time-parser) - Parse date-time-string, liberally. Hides the difference between date-time formats, and enables to manage date and time as the one date-time format. MIT 200 .
⟡ chronicity (https://github.com/chaitanyagupta/chronicity) - A natural language date and time parse, to parse strings like "3 days from now". BSD_3Clause 15 .
⟡ local-time-duration (https://github.com/enaeher/local-time-duration) -
Duration processing library built on top of local-time. MIT 200 .
  ⟡ see this fork: humanize-duration (https://github.com/40ants/humanize-duration), that outputs only significant parts of a duration object. Has localization suport.
⟡ iso-8601-date (https://gitlab.com/DataLinkDroid/iso-8601-date) - Miscellaneous date routines in Common Lisp, based around the ISO 8601 string representation. LLGPL 8 .
⟡ calendar-date (https://github.com/takagi/calendar-date) - a Gregorian calendar date library. MIT 200 .
⟡ periods (https://github.com/jwiegley/periods) - manipulating date/time objects at a higher level. With series-compatible data structure. BSD_3Clause 15 .
  ⟡ with some documentation (https://lisp-maintainers.github.io/periods/)
⟡ stopclock (https://github.com/Gleefre/stopclock) - a library for measuring time using (stop)clocks. It allows you to create a clock, pause it, resume it and change its speed. Apache2.0 89 .
See also the book Calendrical calculations (https://www.cambridge.org/us/academic/subjects/computer-science/computing-general-interest/calendrical-calculations-ultimate-edition-4th-edition?format=HB#resources), by Edward M. Reingold, 
Nachum Dershowitz, Cambridge Press. It provides Lisp sources.
Data validation
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ ratify (https://github.com/Shinmera/ratify) - A collection of utilities to ratify, validate and parse inputs. zlib 33 .
⟡ clavier (https://github.com/mmontone/clavier) - General purpose validation library for Common Lisp. MIT 200 .
⟡ json-schema (https://github.com/fisxoj/json-schema) - A library for validating data against schemas of drafts 4, 6, 7, and 2019-09 of the JSON Schema (https://json-schema.org/) standard. LLGPL 8 .
⟡ sanity-clause (https://github.com/fisxoj/sanity-clause) - a data serialization/contract library for Common Lisp. Schemas can be property lists or class-based, allowing to check slots' types during make-instance. LLGPL 8 .
⟡ cl-semver (https://github.com/cldm/cl-semver) - Implementation of the Semantic Versioning (https://semver.org) Specification. MIT 200 
Developer utilities
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ repl-utilities (https://github.com/m-n/repl-utilities) - Ease
common tasks at the REPL (print documentation, print external symbols,
call hooks when loading a package,…). BSD_2Clause 17 .
⟡ flight-recorder (https://github.com/vseloved/flight-recorder) - a robust REPL history facility.
⟡ tracer (https://github.com/TeMPOraL/tracer) - tracing profiler for Common Lisp, with output suitable for display in Chrome’s/Chromium’s Tracing Viewer. MIT 200 .
⟡ cl-flamegraph (https://github.com/40ants/cl-flamegraph) - A wrapper around SBCL's statistical profiler, to generate FlameGraph charts for Common Lisp programs. BSD 15 .
⟡ cl-debug (https://github.com/LowH/cl-debug) - a cross-package debug facility. Provides a unified way to enable or disable debug-specific code. Debugging code can be enabled or disabled relative to program features denoted by either a 
symbol or a keyword. ISC licence.
⟡ supertrace (https://github.com/fukamachi/supertrace) - Superior Common Lisp trace functionality for debugging/profiling. Trace many functions at once, use before and after hooks. BSD_2Clause 17 .
⟡ printv (https://github.com/danlentz/printv) - A batteries-included tracing and debug-logging macro. Apache2 89 .
⟡ journal (https://github.com/melisgl/journal) - a library for logging, tracing, record-and-replay testing and persistence. MIT.
and also:
⟡ GTFL (http://www.martin-loetzsch.de/gtfl/) - A graphical terminal for Lisp, meant for Lisp programmers who want to debug or visualize their own algorithms. A graphical trace in the browser. BSD-style.
⟡ trivial-benchmark (https://github.com/Shinmera/trivial-benchmark) - Tiny benchmarking library. zlib 33 .
  ⟡ a similar macro (https://github.com/aartaka/graven-image#benchmark-macro) with additional support for more implementations (ABCL, Allegro, CCL, CLISP, ECL).
  ⟡ Indeed, most trivial-benchmark's metrics are only implemented on SBCL. On other implementations, it measures real and user-space time (and not bytes allocated (it does for ECL), system run-time or GC run-time).
⟡ glyphs (https://github.com/ahungry/glyphs/) - A library for cutting down the verboseness of Common Lisp in places. GNU GPL3 2 .
⟡ Lisp REPL core dumper (https://gitlab.com/ambrevar/lisp-repl-core-dumper/) -
A portable wrapper to generate Lisp cores on demand to start REPL blazing fast.
It can preload provided systems to help build a collection of specialized
Lisp cores.
Documentation builders
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ Staple (https://github.com/Shinmera/staple) - a tool to generate documentation pages using an HTML template. Uses the existing README, adds docstrings, crossreferences and links to the CLHS. zlib 33 .
⟡ mgl-pax (https://github.com/melisgl/mgl-pax) - Exploratory
programming environment and documentation generator. one may
accomplish similar effects as with Literate Programming, but
documentation is generated from code, not vice versa. Code is first,
code must look pretty, documentation is code. MIT 200 .
 - see this 40ants/doc (https://github.com/40ants/doc) fork: a lighter core system, a JavaScript search index, multiple format output, HTML themes, RSS and Atom feed for the Changelog and more.
⟡ sphinxcontrib-cldomain (https://sphinxcontrib-cldomain.russellsim.org/) -
 Extending Sphinx to cover Common Lisp. To build documentation with
 the same ease as sphinx would a Python project. GPL3 2 
 - crossreferences, links to the CLHS, symbol index, search, and all Sphinx features.
⟡ Codex (https://github.com/CommonDoc/codex) - A beautiful documentation system for Common Lisp. MIT 200 .
⟡ QBook (https://github.com/mmontone/qbook) - generates HTML (or LaTeX) formatted code listings of Common Lisp source files. BSD_3Clause 15 .
 - all comments started with 4 ; (";;;;") are interpreted as documentation. Enhance the documentation with headings and directives.
 - QBook acts as "a lightweight literate programming system, where Lisp code is not rendered inline, but in separate sections, and that makes the document more pleasant to navigate." @mmontone
⟡ Declt (https://github.com/didierverna/declt) - Reference manual generator for Common Lisp libraries. Builds a texinfo document that can be further processed into various formats, such as HTML or PDF. BSD.
⟡ cl-bibtex (https://github.com/mkoeppe/cl-bibtex) - A compatible re-implementation of the BibTeX program in Common Lisp, with a BST-to-CL compiler. GNU LGPL2.1 11 .
See also:
⟡ docbrowser (https://github.com/lokedhs/docbrowser) - a server that generates documentation for the loaded systems on the fly.
 - Its main page presents a list of all loaded systems in your Lisp image. Click on one system, and you get a page with three panes: functions, classes and variables. Click on a function to see its source, in context, with line 
numbers. Click on classes to see their slots and specializing functions.
⟡ cl-livedocs (https://github.com/mmontone/cl-livedocs) - similar and newer, based on Webinfo, with full text search enabled by default.
An overview blog post with even more documentation generators: https://lisp-journey.gitlab.io/blog/overview-of-documentation-generators/ and a dedicated site with reviews and demos: https://cl-doc-systems.github.io/
You might also like: literate programming systems (#literate-programming).
Files and directories
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ ⭐ uiop (https://common-lisp.net/project/asdf/uiop.html) and its pathname package
 (replaces cl-fad (http://weitz.de/cl-fad/)). uiop is part of ASDF3
 and as thus is shipped in many implementations. MIT 200 .
⟡ osicat (https://common-lisp.net/project/osicat/) - A lightweight operating system interface on POSIX-like systems (directory iteration and deletion, environment variables, file permissions, etc) Expat 14 .
⟡ pathname-utils (https://github.com/Shinmera/pathname-utils) - A collection of utilities to help with pathname operations. zlib 33 .
  ⟡ filesystem-utils (https://github.com/Shinmera/filesystem-utils) - deal with common problems with filesystems, such as listing files, probing file types, determining default directories, etc.
  ⟡ no dependencies, doesn't access the filesystem.
  ⟡ file-attributes (https://github.com/Shinmera/file-attributes) - access to common file attributes (uid, gid, permissions, ctime, mtime, atime).
⟡ filepaths (https://github.com/fosskers/filepaths) - Modern and consistent filepath manipulation for Common Lisp. LGPL3 9 .
  ⟡ no dependencies, doesn't access the filesystem.
⟡ ppath (https://codeberg.org/fourier/ppath) - Common Lisp's implementation of the Python's os.path module. BSD 15 .
⟡ mmap (https://github.com/Shinmera/mmap) - Portable mmap file memory mapping utility library. zlib 33 .
⟡ fof (https://gitlab.com/ambrevar/fof) - File-object finder Common Lisp library. Enable rapid file search, inspection and manipulation. GPL3 2 .
⟡ nfiles (https://github.com/atlas-engineer/nfiles) - File persistence, watching, data synchronization, (per user profile) path resolution, and structured data retrieval. Has pre-defined classes for configuration files, remote fetched 
files, data files, Lisp-readable files and many others. BSD 15 .
File watching libraries:
⟡ file-notify (https://github.com/shinmera/file-notify) - a cross-platform library for file change detection. zlib 33 .
Git
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ cl-git (https://cl-git.russellsim.org/) - a CFFI interface to the libgit2 library. LGPL3 9 .
⟡ legit (https://shinmera.github.io/legit/) - an interface to the Git binary. zlib 33 .
⟡ git-api (https://github.com/fourier/git-api) - Common Lisp library to access a git repository. It doesn't need git or libgit installed. BSD 15 .
i18n
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ cl-i18n (https://notabug.org/cage/cl-i18n) - an i18n library. Load translations from GNU gettext text or binary files or from its native format. Localisation helpers of plural forms. LLGPL 8 .
⟡ gettext (https://github.com/rotatef/gettext) - a port of the gettext runtime to Common Lisp. GPL3 2 .
⟡ translate (https://github.com/dkochmanski/translate) - seamless language localization. LLGPL.
⟡ enchant (https://github.com/tlikonen/cl-enchant) - bindings for the Enchant spell-checker library. Public domain.
⟡ oxenfurt (https://github.com/Shinmera/oxenfurt) - A client library for the Oxford dictionary API. zlib 33 .
⟡ language-codes (https://shinmera.github.io/language-codes) - A database library for ISO language codes. zlib 33 
⟡ system-locale (https://shinmera.github.io/system-locale) - A library to retrieve the user's preferred language, so that your application may choose a sensible default. zlib 33 .
⟡ multilang-documentation (https://shinmera.github.io/multilang-documentation) - Allows writing docstrings in multiple languages, for truly internationally documented libraries. zlib 33 .
Linting, code formatting
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ sblint (https://github.com/fukamachi/sblint) - a linter for Common Lisp source code using SBCL, suited for Reviewdog (slides (http://www.slideshare.net/fukamachi/sblint)). BSD_2Clause 17 .
⟡ trivial-formatter (https://github.com/hyotang666/trivial-formatter) - code formatter for Common Lisp. MIT 200 .
and also: lisp-format (https://github.com/eschulte/lisp-format) and cl-indentify (https://github.com/yitzchak/cl-indentify).
Literate programming
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ literate-lisp (https://github.com/jingtaozf/literate-lisp) - Load Common Lisp code blocks from Emacs' Org files. MIT 200 .
⟡ erudite (https://github.com/mmontone/erudite) - Literate Programming System built with interactive development in mind. MIT 200 .
⟡ papyrus (https://github.com/tani/papyrus) - Papyrus makes your markdown executable with the reader macro of Common Lisp.MIT 200 
Logging
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ ⭐ log4cl (https://github.com/sharplispers/log4cl/) - Logging framework modelled after Log4J. Apache2.0 89 . Advanced integration with Slime.
  ⟡ log4cl-json (https://github.com/40ants/log4cl-json) - JSON appender extension. BSD 15 .
⟡ verbose (https://shinmera.github.io/verbose) - A fast and highly configurable logging framework. zlib 33 .
⟡ a-cl-logger (https://github.com/AccelerationNet/a-cl-logger) - Logging library providing context sensitive logging of more than just strings to more than just local files or output streams. Features logstash support, json support, 
logger hierarchies, context sensitive logging, objects printed as an inspectable presentation,…
To third parties:
⟡ cl-fluent-logger (https://github.com/fukamachi/cl-fluent-logger) - A Common Lisp structured logger for Fluentd (https://www.fluentd.org/).
See also: extensive comparison of logging libraries (https://sabracrolleton.github.io/logging-comparison).
Macro helpers
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ easy-macros (https://github.com/tdrhq/easy-macros/) - an easy way to write 90% of your macros. Apache2.0 89 .
⟡ trivial-with-current-source-from (https://github.com/scymtym/trivial-with-current-source-form/) - Helps macro writers produce better errors for macro users. GPL3 2 .
Markdown
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ 3bmd (https://github.com/3b/3bmd) - a markdown -> html converter. MIT 200 .
PDF
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ cl-typesetting (https://github.com/mbattyani/cl-typesetting) and cl-pdf (https://github.com/mbattyani/cl-pdf) - cross-platform Common Lisp libraries for generating PDF files. FreeBSD 39 .
⟡ cl-pslib (https://notabug.org/cage/cl-pslib) - a (thin) wrapper around the pslib (http://pslib.sourceforge.net/) library for generating PostScript files. Also cl-pslib-barcode (https://notabug.org/cage/cl-pslib-barcode). LLGPL 8 .
Plotting
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ vgplot (https://github.com/volkers/vgplot) - an interface to the
 gnuplot plotting utility with the intention to resemble some of
 the plot commands of octave or matlab. GPL3 2 .
⟡ eazy-gnuplot (https://github.com/guicho271828/eazy-gnuplot) - a
 lispy, structure-less Gnuplot library. With its
 cookbook (http://guicho271828.github.io/eazy-gnuplot/). LLGPL 8 
⟡ kai (https://github.com/komi1230/kai) - A high-level plotter library for Common Lisp. A wrapper around the Plotly (https://plotly.com/javascript/) JS library. MIT 200 .
⟡ ADW-Charting (https://common-lisp.net/project/adw-charting/) - A simple chart drawing library written completely in Common Lisp. Also includes a backend to Google's chart service. BSD-like.
Plotting with text:
⟡ cl-text-plot (https://github.com/moneylobster/cl-text-plot/) - Plot with text in Common Lisp. No licence specified.
⟡ cl-spark (https://github.com/tkych/cl-spark) - sparkline strings for the console: (spark '(1 1 2 3 5 8)) => "▁▁▂▃▅▇". MIT 200 .
See also the chart facilities of IUP and ltk-plotchart (GUI section).
Project skeletons
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ cl-project (https://github.com/fukamachi/cl-project) - General modern project skeletons. LLGPL 8 .
⟡ cl-project-with-docs (https://github.com/40ants/cl-project-with-docs) - uses Sphinx and reStructured text to render nice and readable HTML documentation. BSD 15 .
⟡ cl-cookieproject (https://github.com/vindarel/cl-cookieproject) - Generate a ready-to-use Common Lisp project. Not in Quicklisp. BSD_3Clause 15 .
  ⟡ test definitions, entry point to run from sources, build a binary, Roswell integration…
Security
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ cl-isolated (https://github.com/kanru/cl-isolated) - A restricted environment for Common Lisp code evaluation AGPL-3.0 agpl3 .
System interface
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ machine-state (https://github.com/Shinmera/machine-state/) - Retrieve machine state information about CPU time, memory usage, thread processing time, etc.
XML
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
⟡ CXML (https://common-lisp.net/project/cxml/) - XML parser and serializer, with a range of extension libraries. LLGPL 8 .
 - 👍 has an incremental parser, allowing to parse big files.
 - see the FXML (https://github.com/ruricolist/FXML) fork, with fixes and new features. You should use it if your are parsing potentially ill-formed or malicious XML, or if you need to use Klacks with namespaces.
⟡ Plump 71 - A lenient XML parser. zlib 33 .
⟡ xpath (https://github.com/sharplispers/xpath) (homepage (https://common-lisp.net/project/plexippus-xpath/atdoc/index.html) - Implementation of the XML Path Language (XPath) Version 1.0. BSD_2Clause 17 .
⟡ s-xml (http://cliki.net/S-XML) - A basic parser. LLGPL 8 .
⟡ xmls (https://github.com/rpgoldman/xmls) - A small, simple, non-validating XML parser. 3-clause BSD 15 .
⟡ cl-feedparser (https://github.com/TBRSS/cl-feedparser) - A Common Lisp (RSS, Atom) feed parser. LLGPL 8 
⟡ Buildnode (https://github.com/AccelerationNet/buildnode) - A common lisp library to ease interaction with CXML-dom, such as building Excel spreadsheets. BSD 15 .
To read Excel files:
⟡ lisp-xl (https://github.com/defunkydrummer/lisp-xl) - Common Lisp Microsoft XLSX (Microsoft Excel) loader for arbitrarily-sized / big-size files. MIT.
⟡ xlsx (https://gitlab.common-lisp.net/cungil/xlsx) - a basic reader for Excel files.
Other
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
This contains anything which doesn't fit into another category.
⟡ babel (https://github.com/cl-babel/babel) - A charset encoding/decoding library. Expat 14 .
⟡ corona (https://github.com/eudoxia0/corona) - Create and manage virtual machines from Common Lisp http://eudoxia.me/corona MIT 200 .
⟡ fast-io (https://github.com/rpav/fast-io) - Fast octet-vector/stream I/O. 3-clause BSD 15 .
⟡ named-readtables (https://github.com/melisgl/named-readtables) - Provides a readtable namespace, akin to package namespaces. 3-clause BSD 15 .
⟡ simple-currency (https://github.com/a0-prw/simple-currency) - A currency conversion library using daily information published by the ECB. FreeBSD 39 .
⟡ trivial-garbage (https://github.com/trivial-garbage/trivial-garbage) - A portable finalizer, weak hash-table and weak pointer API. Public domain.
⟡ trivial-utf8 (https://common-lisp.net/project/trivial-utf-8/) - A small library for doing UTF-8-based I/O. BSD.
Contributing
============
Your contributions are always welcome! Please submit a pull request or create
an issue to add a new framework, library or software to the list.
The rules we (try to) respect are the followings:
- by default, add a library to the end of its section.
- absolute de-facto libraries, like BordeauxThreads or Quicklisp,
 should be denoted with a ⭐ (Unicode code U+2B50).
- two libraries very similar in scope should be side by side, or in a
 section of their own.
- do some curation based on your experience and the state of the
 library's documentation. We do not aim at listing every existing
 CL library (see Cliki for that) nor to list every
 "popular" library (see Quicklisp stats).
- as such, the libraries we like best are marked with a 👍 (1F44D
 unicode character). See also the signs' explanation in the
 introduction.
2 : http://www.gnu.org/copyleft/gpl.html
3 : http://www.gnu.org/software/classpath/license.html
4 : https://common-lisp.net/project/armedbear/faq.shtml#qa
5 : http://unlicense.org/
6 : http://www.gnu.org/software/clisp/impnotes.html
8 : http://opensource.franz.com/preamble.html
9 : https://www.gnu.org/licenses/lgpl-3.0.en.html
11 : http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
13 : http://www.sbcl.org/manual/index.html#ANSI-Conformance
14 : https://directory.fsf.org/wiki/License:Expat
15 : https://directory.fsf.org/wiki/License:BSD_3Clause
16 : https://www.quicklisp.org/beta/
17 : https://directory.fsf.org/wiki/License:BSD_2Clause
20 : http://www.cs.northwestern.edu/academics/courses/325/readings/graham/graham-notes.html
21 : http://www.goodreads.com/book/show/1175730.Object_Oriented_Programming_in_Common_LISP
22 : https://en.wikipedia.org/wiki/ISC_license
33 : https://directory.fsf.org/wiki/License:Zlib
39 : https://directory.fsf.org/wiki?title=License:FreeBSD
47 : https://directory.fsf.org/wiki/License:CPLv1.0
51 : https://directory.fsf.org/wiki/License:ArtisticLicense2.0
54 : https://directory.fsf.org/wiki/License:Boost1.0
59 : https://directory.fsf.org/wiki/License:EPLv1.0
71 : https://github.com/Shinmera/plump
72 : https://github.com/Shinmera/lquery
89 : https://directory.fsf.org/wiki/License:Apache2.0
156 : http://letoverlambda.com/
157 : http://norvig.com/paip.html
176 : https://github.com/gwkkwg/lift/blob/master/COPYING
188 : https://github.com/triclops200/quickapp
200 : https://opensource.org/licenses/MIT
201 : https://github.com/google/lisp-koans
205 : https://www.postgresql.org/about/licence/
206 : http://www.gigamonkeys.com/book/
207 : https://opensource.org/licenses/bsd-license.php
208 : https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
209 : http://www.eclipse.org/legal/epl-v10.html
210 : https://common-lisp.net/project/linedit/license.html
agpl3 : https://directory.fsf.org/wiki/License:AGPL-3.0
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