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<div data-align="center">
<p>
<a href="https://awesome-ruby.com"><img src="https://raw.githubusercontent.com/markets/awesome-ruby/gh-pages/images/logo_m.png"></a>
</p>
<h3>
<a href="https://awesome-ruby.com">Awesome Ruby</a>
</h3>
<p>
<a href="https://github.com/sindresorhus/awesome"><img src="https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg"></a>
</p>
</div>
<p>A categorized community-driven collection of awesome Ruby libraries,
tools, frameworks and software. The essential Ruby to build modern Apps
and Web Apps.</p>
<p>Sharing, suggestions and contributions are always welcome! Please
take a look at the <a
href="https://github.com/markets/awesome-ruby/blob/master/CONTRIBUTING.md">contribution
guidelines and quality standard</a> first.</p>
<p>Thanks to all <a
href="https://github.com/markets/awesome-ruby/graphs/contributors">contributors</a>,
you’re awesome and this wouldn’t be possible without you!</p>
<div align="center">
<hr>
<sup><b>Sponsored by:</b></sup> <br> <br>
<a href="https://betterstack.com">
<div>
<pre><code> &lt;img src=&quot;https://raw.githubusercontent.com/markets/awesome-ruby/master/media/sponsors/betterstack.png&quot; width=&quot;200&quot; alt=&quot;Better Stack&quot;&gt;
&lt;/div&gt;
&lt;div&gt;
Better Stack lets you see inside any stack,&lt;br&gt;
debug any issue, and resolve any incident.
&lt;/div&gt;</code></pre>
</a> <br>
<hr>
</div>
<ul>
<li><a href="#admin-interface">Admin Interface</a></li>
<li><a href="#analytics">Analytics</a></li>
<li><a href="#api-builder-and-discovery">API Builder and
Discovery</a></li>
<li><a href="#assets">Assets</a></li>
<li><a href="#authentication-and-oauth">Authentication and
OAuth</a></li>
<li><a href="#authorization">Authorization</a></li>
<li><a href="#automation">Automation</a></li>
<li><a href="#breadcrumbs">Breadcrumbs</a></li>
<li><a href="#business-logic">Business logic</a></li>
<li><a href="#caching">Caching</a></li>
<li><a href="#captchas-and-anti-spam">Captchas and anti-spam</a></li>
<li><a href="#cli-builder">CLI Builder</a></li>
<li><a href="#cli-utilities">CLI Utilities</a></li>
<li><a href="#cloud">Cloud</a></li>
<li><a href="#cms">CMS</a></li>
<li><a href="#code-analysis-and-metrics">Code Analysis and
Metrics</a></li>
<li><a href="#code-formatting">Code Formatting</a></li>
<li><a href="#code-highlighting">Code Highlighting</a></li>
<li><a href="#code-loaders">Code Loaders</a></li>
<li><a href="#coding-style-guides">Coding Style Guides</a></li>
<li><a href="#concurrency-and-parallelism">Concurrency and
Parallelism</a></li>
<li><a href="#configuration">Configuration</a></li>
<li><a href="#core-extensions">Core Extensions</a></li>
<li><a href="#country-data">Country Data</a></li>
<li><a href="#crm">CRM</a></li>
<li><a href="#cryptocurrencies-and-blockchains">Cryptocurrencies and
Blockchains</a></li>
<li><a href="#dashboards">Dashboards</a></li>
<li><a href="#data-processing-and-etl">Data Processing and ETL</a></li>
<li><a href="#data-visualization">Data Visualization</a></li>
<li><a href="#database-drivers">Database Drivers</a></li>
<li><a href="#database-tools">Database Tools</a></li>
<li><a href="#date-and-time-processing">Date and Time
Processing</a></li>
<li><a href="#debugging-tools">Debugging Tools</a></li>
<li><a href="#decorators">Decorators</a></li>
<li><a href="#devops-tools">DevOps Tools</a></li>
<li><a href="#diff">Diff</a></li>
<li><a href="#discover">Discover</a></li>
<li><a href="#documentation">Documentation</a></li>
<li><a href="#e-commerce-and-payments">E-Commerce and Payments</a></li>
<li><a href="#ebook">Ebook</a></li>
<li><a href="#email">Email</a></li>
<li><a href="#encryption">Encryption</a></li>
<li><a href="#environment-management">Environment Management</a></li>
<li><a href="#error-handling">Error Handling</a></li>
<li><a href="#event-sourcing">Event Sourcing</a></li>
<li><a href="#feature-flippers-and-ab-testing">Feature Flippers and A/B
Testing</a></li>
<li><a href="#file-upload">File Upload</a></li>
<li><a href="#file-system-listener">File System Listener</a></li>
<li><a href="#form-builder">Form Builder</a></li>
<li><a href="#game-development-and-graphics">Game Development and
Graphics</a></li>
<li><a href="#gem-generators">Gem Generators</a></li>
<li><a href="#gem-servers">Gem Servers</a></li>
<li><a href="#geolocation">Geolocation</a></li>
<li><a href="#git-tools">Git Tools</a></li>
<li><a href="#graphql">GraphQL</a></li>
<li><a href="#gui">GUI</a></li>
<li><a href="#htmlxml-parsing">HTML/XML Parsing</a></li>
<li><a href="#http-clients-and-tools">HTTP Clients and tools</a></li>
<li><a href="#image-processing">Image Processing</a></li>
<li><a
href="#implementationscompilers">Implementations/Compilers</a></li>
<li><a href="#internationalization">Internationalization</a></li>
<li><a href="#irb">IRB</a></li>
<li><a href="#logging">Logging</a></li>
<li><a href="#machine-learning">Machine Learning</a></li>
<li><a href="#markdown-processors">Markdown Processors</a></li>
<li><a href="#measurements">Measurements</a></li>
<li><a href="#mobile-development">Mobile Development</a></li>
<li><a href="#money">Money</a></li>
<li><a href="#music-and-sound">Music and Sound</a></li>
<li><a href="#natural-language-processing">Natural Language
Processing</a></li>
<li><a href="#networking">Networking</a></li>
<li><a href="#notifications">Notifications</a></li>
<li><a href="#optimizations">Optimizations</a></li>
<li><a href="#ormodm">ORM/ODM</a></li>
<li><a href="#ormodm-extensions">ORM/ODM Extensions</a></li>
<li><a href="#package-management">Package Management</a></li>
<li><a href="#pagination">Pagination</a></li>
<li><a href="#pdf">PDF</a></li>
<li><a href="#performance-monitoring">Performance Monitoring</a></li>
<li><a href="#presentation-programs">Presentation Programs</a></li>
<li><a href="#process-management-and-monitoring">Process Management and
Monitoring</a></li>
<li><a href="#processes">Processes</a></li>
<li><a href="#profiler-and-optimization">Profiler and
Optimization</a></li>
<li><a href="#qr">QR</a></li>
<li><a href="#queues-and-messaging">Queues and Messaging</a></li>
<li><a href="#rails-application-generators">Rails Application
Generators</a></li>
<li><a href="#robotics">Robotics</a></li>
<li><a href="#rss">RSS</a></li>
<li><a href="#serverless">Serverless</a></li>
<li><a href="#scheduling">Scheduling</a></li>
<li><a href="#scientific">Scientific</a></li>
<li><a href="#search">Search</a></li>
<li><a href="#security">Security</a></li>
<li><a href="#services-and-apps">Services and Apps</a></li>
<li><a href="#seo">SEO</a></li>
<li><a href="#social-networking">Social Networking</a></li>
<li><a href="#spreadsheets-and-documents">Spreadsheets and
Documents</a></li>
<li><a href="#state-machines">State Machines</a></li>
<li><a href="#static-site-generation">Static Site Generation</a></li>
<li><a href="#template-engine">Template Engine</a></li>
<li><a href="#testing">Testing</a></li>
<li><a href="#third-party-apis">Third-party APIs</a></li>
<li><a href="#video">Video</a></li>
<li><a href="#view-components">View components</a></li>
<li><a href="#view-helpers">View helpers</a></li>
<li><a href="#web-crawling">Web Crawling</a></li>
<li><a href="#web-frameworks">Web Frameworks</a></li>
<li><a href="#web-servers">Web Servers</a></li>
<li><a href="#websocket">WebSocket</a></li>
</ul>
<h2 id="admin-interface">Admin Interface</h2>
<ul>
<li><a href="http://activeadmin.info">ActiveAdmin</a> - A Ruby on Rails
framework for creating elegant backends for website administration.</li>
<li><a
href="https://github.com/activescaffold/active_scaffold">ActiveScaffold</a>
- ActiveScaffold provides quick and powerful user interfaces for CRUD
(create, read, update, delete) operations for Rails applications. It’s
excellent for generating admin interfaces, managing Data-Heavy
Applications, creating Widgets or for quick prototyping. ActiveScaffold
is completly customizable and offers a bunch of additional features
including searching, pagination, layout control and overrides of fields,
forms and templates.</li>
<li><a
href="https://github.com/thoughtbot/administrate">Administrate</a> - A
Rails engine that helps you put together a super-flexible admin
dashboard, by Thoughtbot.</li>
<li><a href="https://avohq.io/rails-admin">Avo Admin for Rails</a> - Avo
is the modern approach to building an advanced admin panel that can be
used by the entire organization. It has all the tools an admin panel
needs and more. We have carefully made sure that you have all the escape
hatches you need to ensure you can build your next admin panel for Ruby
on Rails incredibly fast and easily.</li>
<li><a href="http://antpaw.github.io/bhf/">bhf</a> - A simple to use
Rails-Engine-Gem that offers an admin interface for trusted user.</li>
<li><a href="https://github.com/hot-glue-for-rails/hot-glue/">Hot
Glue</a> - Hot Glue takes a different approach to building both admin
and user dashboards. It is a code generation tool like the Rails
scaffold generator but with significantly more features. Instead of
providing a lot of configuration options, Hot Glue can generate your
code. Good for lists &amp; CRUD views for both admin and user-facing
dashboards.</li>
<li><a href="https://github.com/excid3/madmin">Madmin</a> - A robust
Admin Interface for Ruby on Rails apps</li>
<li><a
href="https://github.com/motor-admin/motor-admin-rails">MotorAdmin</a> -
A low-code Admin panel and Business Intelligence Rails engine. No DSL -
configurable from the UI.</li>
<li><a href="https://github.com/sferik/rails_admin">RailsAdmin</a> - A
Rails engine that provides an easy-to-use interface for managing your
data.</li>
<li><a href="https://github.com/TrestleAdmin/trestle">Trestle</a> - A
modern, responsive admin framework for Rails. Build a back-end in
minutes that will grow with the needs of your application.</li>
</ul>
<h2 id="analytics">Analytics</h2>
<ul>
<li><a
href="https://github.com/BaseSecrete/active_analytics">ActiveAnalytics</a>
- First-party, privacy-focused traffic analytics for Ruby on Rails
applications.</li>
<li><a href="https://github.com/ankane/ahoy">Ahoy</a> - A solid
foundation to track visits and events in Ruby, JavaScript, and native
apps.</li>
<li><a
href="https://github.com/charlotte-ruby/impressionist">Impressionist</a>
- Rails Plugin that tracks impressions and page views.</li>
<li><a href="https://github.com/tpitale/legato">Legato</a> - Model
analytics reports and queries against the official Google Analytics
Reporting API.</li>
<li><a
href="https://github.com/railslove/rack-tracker">Rack::Tracker</a> -
Rack middleware that can be hooked up to multiple services and exposing
them in a unified fashion.</li>
<li><a href="https://github.com/tpitale/staccato">Staccato</a> - Track
analytics into the official Google Analytics Collection API.</li>
</ul>
<h2 id="api-builder-and-discovery">API Builder and Discovery</h2>
<ul>
<li><a
href="https://github.com/rails-api/active_model_serializers">ActiveModel::Serializers</a>
- JSON serialization of objects.</li>
<li><a href="https://github.com/fabrik42/acts_as_api">Acts_As_Api</a> -
Easy And Fun, in creating XML/JSON responses in Rails 3,4,5 and 6.</li>
<li><a href="https://github.com/okuramasafumi/alba">Alba</a> - A JSON
serializer for Ruby, JRuby and TruffleRuby.</li>
<li><a href="https://github.com/inf0rmer/blanket">Blanket</a> - A dead
simple API wrapper.</li>
<li><a href="https://github.com/procore/blueprinter">Blueprinter</a> -
Simple, Fast, and Declarative Serialization Library for Ruby.</li>
<li><a
href="https://github.com/codenoble/cache-crispies">cache_crispies</a> -
Speedy Rails JSON serialization with built-in caching.</li>
<li><a href="https://github.com/crepe/crepe">Crepe</a> - The thin API
stack.</li>
<li><a href="http://www.ruby-grape.org">Grape</a> - An opinionated
micro-framework for creating REST-like APIs in Ruby.</li>
<li><a href="https://github.com/remiprev/her">Her</a> - an ORM that maps
REST resources to Ruby objects. Designed to build applications that are
powered by a RESTful API instead of a database.</li>
<li><a href="https://github.com/rails/jbuilder">jbuilder</a> - Create
JSON structures via a Builder-style DSL.</li>
<li><a href="http://jsonapi-rb.org">jsonapi-rb</a> – Efficient and
convenient JSON API (de)serialization library.</li>
<li><a
href="https://github.com/jsonapi-serializer/jsonapi-serializer">jsonapi-serializer</a>
- A fast JSON:API serializer for Ruby Objects.</li>
<li><a
href="https://github.com/cerebris/jsonapi-resources">JSONAPI::Resources</a>
- JSONAPI::Resources, or “JR”, provides a framework for developing a
server that complies with the JSON API specification.</li>
<li><a
href="https://github.com/tiagopog/jsonapi-utils">JSONAPI::Utils</a> -
JSONAPI::Utils is built on top of JSONAPI::Resources taking advantage of
its resource-driven style and bringing an easy way to build modern JSON
APIs with no or less learning curve.</li>
<li><a href="https://github.com/crepe/jsonite">Jsonite</a> - A tiny,
HAL-compliant JSON presenter for your APIs.</li>
<li><a href="https://github.com/interagent/pliny">Pliny</a> -
Opinionated template Sinatra app for writing excellent APIs in
Ruby.</li>
<li><a href="https://github.com/nesquena/rabl">rabl</a> - General ruby
templating with json, bson, xml, plist and msgpack support.</li>
<li><a href="https://github.com/apotonick/roar">Roar</a> -
Resource-Oriented Architectures in Ruby.</li>
<li><a href="https://github.com/balvig/spyke">Spyke</a> - Interact with
REST services in an ActiveRecord-like manner.</li>
<li><a href="https://github.com/bwillis/versioncake">Version Cake</a> -
An unobtrusive way to version APIs in your Rails app.</li>
<li><a href="https://github.com/bploetz/versionist">versionist</a> - A
plugin for versioning Rails based RESTful APIs.</li>
</ul>
<h2 id="assets">Assets</h2>
<ul>
<li><a href="https://github.com/AssetSync/asset_sync">Asset Sync</a> -
Synchronises Assets between Rails and S3.</li>
<li><a href="https://github.com/ai/autoprefixer-rails">Autoprefixer</a>
- Parse CSS and add vendor prefixes to rules by Can I Use.</li>
<li><a href="https://github.com/thoughtbot/bourbon">Bourbon</a> - A
Lightweight Sass Tool Set.</li>
<li><a href="https://github.com/rharriso/bower-rails">bower-rails</a> -
Bower support for Rails projects.</li>
<li><a href="https://github.com/wpeterson/emoji">Emoji</a> - Exposes the
Phantom Open Emoji library unicode/image assets and APIs for working
with them.</li>
<li><a href="https://github.com/metaskills/less-rails">Less Rails</a> -
The dynamic stylesheet language for the Rails asset pipeline.</li>
<li><a href="https://rails-assets.org">Rails Assets</a> - Bundler to
Bower proxy.</li>
<li><a href="http://sass-lang.com">Sass</a> - Sass makes CSS fun
again.</li>
<li><a href="https://github.com/shakacode/shakapacker">Shakapacker</a> -
Use Webpack to manage app-like JavaScript modules in Rails. (Official
and actively maintained successor to rails/webpacker)</li>
<li><a href="https://github.com/rails/sprockets">Sprockets</a> -
Rack-based asset packaging system.</li>
<li><a href="https://github.com/torba-rb/torba">Torba</a> - Bower-less
bundler for Sprockets.</li>
<li><a href="https://github.com/elmassimo/vite_ruby">Vite Ruby</a> - Use
Vite.js as a modern assets pipeline in Ruby and Rails apps.</li>
</ul>
<h2 id="authentication-and-oauth">Authentication and OAuth</h2>
<ul>
<li><a href="https://github.com/Gokul595/api_guard">API Guard</a> - JWT
authentication solution for Rails APIs.</li>
<li><a
href="https://github.com/lazaronixon/authentication-zero">Authentication
Zero</a> - An authentication system generator for Rails
applications.</li>
<li><a href="https://github.com/binarylogic/authlogic">Authlogic</a> -
Authlogic is a clean, simple, and unobtrusive ruby authentication
solution.</li>
<li><a href="https://github.com/thoughtbot/clearance">Clearance</a> -
Small and simple email &amp; password based authentication for
Rails.</li>
<li><a href="https://github.com/heartcombo/devise">Devise</a> - A
flexible authentication solution for Rails based on Warden.</li>
<li><a href="https://github.com/jwt/ruby-jwt">JWT</a> - JSON Web Token
implementation in Ruby.</li>
<li><a href="https://github.com/halogenandtoast/monban">Monban</a> - A
very simple and extensible user authentication library for rails.</li>
<li><a href="https://github.com/omniauth/omniauth">OmniAuth</a> - A
library that standardizes multi-provider authentication utilizing Rack
middleware.</li>
<li><a href="https://github.com/jeremyevans/rodauth">Rodauth</a> -
Authentication and account management framework for Rack
applications.</li>
<li><a href="https://github.com/Sorcery/sorcery">Sorcery</a> - A
stripped-down, bare-bones authentication library for Rails.</li>
<li><a href="https://github.com/hassox/warden">warden</a> - General Rack
Authentication Framework.</li>
<li>OAuth:
<ul>
<li><a
href="https://github.com/doorkeeper-gem/doorkeeper">Doorkeeper</a> - An
OAuth2 provider for Rails.</li>
<li><a href="https://github.com/intridea/oauth2">OAuth2</a> - A Ruby
wrapper for the OAuth 2.0 protocol.</li>
<li><a
href="https://gitlab.com/honeyryderchuck/rodauth-oauth">Rodauth-Oauth</a>
- A rodauth OAuth and OpenID provider plugin.</li>
</ul></li>
</ul>
<h2 id="authorization">Authorization</h2>
<ul>
<li><a href="https://github.com/be9/acl9">acl9</a> - Acl9 is a
role-based authorization system that provides a concise DSL for securing
your Rails application.</li>
<li><a
href="https://github.com/chaps-io/access-granted">AccessGranted</a> -
Multi-role and whitelist based authorization gem for Rails.</li>
<li><a href="https://github.com/palkan/action_policy">ActionPolicy</a> -
Authorization framework for Ruby and Rails applications. Composable,
extensible and performant.</li>
<li><a href="https://github.com/CanCanCommunity/cancancan">CanCanCan</a>
- Continuation of CanCan, an authorization Gem for Ruby on Rails.</li>
<li><a href="https://github.com/makandra/consul">Consul</a> - A
scope-based authorization solution for Ruby on Rails.</li>
<li><a href="https://github.com/elorest/petergate">Petergate</a> - Easy
to use and read action and content based authorizations.</li>
<li><a href="https://github.com/elabs/pundit">Pundit</a> - Minimal
authorization through OO design and pure Ruby classes.</li>
</ul>
<h2 id="automation">Automation</h2>
<ul>
<li><a
href="https://github.com/automaticmode/active_workflow">ActiveWorkflow</a>
- An intelligent process and workflow automation platform based on
software agents.</li>
<li><a href="https://github.com/danger/danger">Danger</a> - Automate
your team’s conventions surrounding code review.</li>
<li><a href="https://github.com/cantino/huginn">Huginn</a> - Huginn is a
system for building agents that perform automated tasks for you
online.</li>
<li><a href="https://github.com/alexgenco/neovim-ruby">Neovim</a> - Ruby
bindings for Neovim to make your own neovim editor plugins in Ruby.</li>
<li><a href="https://github.com/braintree/runbook">Runbook</a> - A
framework and Ruby DSL for progressive system automation.</li>
</ul>
<h2 id="breadcrumbs">Breadcrumbs</h2>
<ul>
<li><a href="https://github.com/weppos/breadcrumbs_on_rails">Breadcrumbs
on Rails</a> - A simple Ruby on Rails plugin for creating and managing a
breadcrumb navigation for a Rails project.</li>
<li><a href="https://github.com/lassebunk/gretel">Gretel</a> - A Ruby on
Rails plugin that makes it easy yet flexible to create breadcrumbs.</li>
<li><a href="https://github.com/peter-murach/loaf">loaf</a> - Manages
and displays breadcrumb trails in Rails app - lean &amp; mean.</li>
<li><a href="https://github.com/codeplant/simple-navigation">Simple
Navigation</a> - A ruby gem for creating navigation (html list, link
list or breadcrumbs with multiple levels) for your Rails 2, 3 &amp; 4,
Sinatra or Padrino.</li>
</ul>
<h2 id="business-logic">Business logic</h2>
<ul>
<li><a
href="https://github.com/AaronLasseigne/active_interaction">ActiveInteraction</a>
- Manage application specific business logic.</li>
<li><a
href="https://github.com/collectiveidea/interactor">Interactor</a> -
Interactor provides a common interface for performing complex
interactions in a single request.</li>
<li><a href="https://github.com/adomokos/light-service">Light
Service</a> - Series of Actions with an emphasis on simplicity.</li>
<li><a href="https://github.com/cypriss/mutations">Mutations</a> -
Compose your business logic into commands that sanitize and validate
input.</li>
<li><a href="https://github.com/saturnflyer/surrounded">Surrounded</a> -
Encapsulated related objects in a single system to add behavior during
runtime. Extensible implementation of DCI.</li>
<li><a href="https://github.com/apneadiving/waterfall">Waterfall</a> - A
slice of functional programming to chain ruby services and blocks, thus
providing a new approach to flow control.</li>
<li><a href="https://github.com/krisleech/wisper">wisper</a> - A micro
library providing Ruby objects with Publish-Subscribe capabilities.</li>
</ul>
<h2 id="caching">Caching</h2>
<ul>
<li><a href="https://github.com/rails/actionpack-action_caching">Action
caching for Action Pack</a> - Action caching for Action Pack.</li>
<li><a href="https://github.com/mperham/dalli">Dalli</a> - A high
performance pure Ruby client for accessing memcached servers.</li>
<li><a href="https://github.com/artsy/garner">Garner</a> - A set of Rack
middleware and cache helpers that implement various caching
strategies.</li>
<li><a
href="https://github.com/Shopify/identity_cache">IdentityCache</a> - A
blob level caching solution to plug into ActiveRecord.</li>
<li><a href="https://github.com/IFTTT/kashmir">Kashmir</a> - Kashmir is
a Ruby DSL that makes serializing and caching objects a snap.</li>
<li><a href="https://github.com/sorentwo/readthis">Readthis</a> - High
performance, pooled, ActiveSupport compliant caching with Redis.</li>
<li><a href="https://github.com/orslumen/record-cache">Record Cache</a>
- Cache Active Model Records in Rails 3.</li>
<li><a href="http://redis-store.org/">redis-store</a> - Redis Store
provides a full set of stores (Cache, I18n, Session, HTTP Cache) for
modern Ruby frameworks like: Ruby on Rails, Sinatra, Rack, Rack::Cache
and I18n. It supports object marshalling, timeouts, single or multiple
nodes, and namespaces.</li>
<li><a href="https://github.com/hooopo/second_level_cache">Second Level
Cache</a> - Write-Through and Read-Through caching library for
ActiveRecord 4.</li>
</ul>
<h2 id="captchas-and-anti-spam">Captchas and anti-spam</h2>
<ul>
<li><a
href="https://github.com/matthutchinson/acts_as_textcaptcha">ActsAsTextcaptcha</a>
- Protection for Rails models with text-based logic question captchas
(from Rob Tuley’s textcaptcha.com)</li>
<li><a href="https://github.com/markets/invisible_captcha">Invisible
Captcha</a> - Unobtrusive and flexible spam protection based on the
honeypot strategy. It also provides a time-sensitive form
submission.</li>
<li><a href="https://github.com/joshfrench/rakismet">Rakismet</a> - Easy
Akismet and TypePad AntiSpam integration for Rails.</li>
<li><a href="https://github.com/ambethia/recaptcha">reCAPTCHA</a> -
reCaptcha API helpers for ruby apps.</li>
<li><a href="https://github.com/biola/Voight-Kampff">Voight-Kampff</a> -
A Ruby gem that detects bots, spiders, crawlers and replicants.</li>
</ul>
<h2 id="cli-builder">CLI Builder</h2>
<ul>
<li><a href="https://github.com/mdub/clamp">Clamp</a> - A command-line
application framework.</li>
<li><a href="http://cmdparse.gettalong.org">cmdparse</a> - An advanced
command line parser supporting nested commands.</li>
<li><a href="https://github.com/commander-rb/commander">Commander</a> -
The complete solution for Ruby command-line executables.</li>
<li><a href="https://github.com/dry-rb/dry-cli">dry-cli</a> - General
purpose Command Line Interface (CLI) framework for Ruby.</li>
<li><a href="https://github.com/davetron5000/gli">GLI</a> - Git-Like
Interface Command Line Parser.</li>
<li><a href="https://github.com/ahoward/main">Main</a> - A class factory
and DSL for generating command line programs real quick.</li>
<li><a href="https://github.com/ManageIQ/optimist">Optimist</a> - A
commandline option parser for Ruby that just gets out of your way.</li>
<li><a href="https://github.com/ruby/rake">Rake</a> - A make-like build
utility for Ruby.</li>
<li><a href="https://github.com/DannyBen/runfile">Runfile</a> - Build
command line applications per project with ease. Rake-inspired, Docopt
inside.</li>
<li><a href="https://github.com/leejarvis/slop">Slop</a> - Simple
Lightweight Option Parsing.</li>
<li><a href="https://github.com/thoughtbot/terrapin">Terrapin</a> - A
small command line library (Formerly Cocaine).</li>
<li><a href="http://whatisthor.com">Thor</a> - A toolkit for building
powerful command-line interfaces.</li>
<li><a href="https://github.com/peter-murach/tty">TTY</a> - Toolbox for
developing CLI clients.</li>
</ul>
<h2 id="cli-utilities">CLI Utilities</h2>
<ul>
<li><a href="https://github.com/awesome-print/awesome_print">Awesome
Print</a> - Pretty print your Ruby objects with style – in full color
and with proper indentation</li>
<li><a href="https://github.com/pickhardt/betty">Betty</a> - Friendly
English-like interface for your command line. Don’t remember a command?
Ask Betty.</li>
<li><a href="https://github.com/fazibear/colorize">colorize</a> -
Extends String class or add a ColorizedString with methods to set text
color, background color and text effects.</li>
<li><a href="https://github.com/athityakumar/colorls">colorls</a> -
Beautifies the <code>ls</code> command, with color and font-awesome
icons.</li>
<li><a href="https://github.com/geemus/formatador">formatador</a> -
STDOUT text formatting.</li>
<li><a href="https://github.com/janlelis/paint">Paint</a> - Simple and
fast way to set ANSI terminal colors.</li>
<li><a href="https://github.com/peter-murach/pastel">Pastel</a> -
Terminal output styling with intuitive and clean API.</li>
<li><a href="https://github.com/tombenner/ru">Ru</a> - Ruby in your
shell.</li>
<li><a
href="https://github.com/jfelchner/ruby-progressbar">Ruby/Progressbar</a>
- The most flexible text progress bar library for Ruby.</li>
<li><a href="https://github.com/matt-harvey/tabulo">Tabulo</a> - Plain
text table generator with a DRY, column-based API.</li>
<li><a href="https://github.com/arches/table_print">TablePrint</a> -
Slice your data from multiple DB tables into a single CLI view.</li>
<li><a href="https://github.com/tj/terminal-table">Terminal Table</a> -
Ruby ASCII Table Generator, simple and feature rich.</li>
<li><a href="https://github.com/tmuxinator/tmuxinator">Tmuxinator</a> -
Create and manage complex tmux sessions easily.</li>
<li><a href="https://github.com/janlelis/whirly">Whirly</a> - A simple,
colorful and customizable terminal spinner library for Ruby.</li>
</ul>
<h2 id="cloud">Cloud</h2>
<ul>
<li><a href="https://github.com/aws/aws-sdk-ruby">AWS SDK for Ruby</a> -
The official AWS SDK for Ruby.</li>
<li><a
href="https://github.com/projecthydra/browse-everything">browse-everything</a>
- Multi-provider Rails engine providing access to files in cloud
storage.</li>
<li><a href="https://github.com/fog/fog">Fog</a> - The Ruby cloud
services library.</li>
<li><a href="https://github.com/kddeisz/humidifier">humidifier</a> -
Programmatically generate and manage AWS CloudFormation templates,
stacks, and change sets.</li>
</ul>
<h2 id="cms">CMS</h2>
<ul>
<li><a href="https://alchemy-cms.com">Alchemy CMS</a> - A powerful,
userfriendly and flexible Open Source Rails CMS.</li>
<li><a
href="https://avohq.io/ruby-on-rails-content-management-system">Avo CMS
for Rails</a> - Avo is a very custom Content Management System for Ruby
on Rails that saves engineers and teams months of development time. It’s
designed to use your app’s database structure, uses configuration
instead of traditional methods, and when configuration isn’t enough, it
falls back to writing regular Rails code that you’re used to.</li>
<li><a href="http://camaleon.tuzitio.com/">Camaleon CMS</a> - A dynamic
and advanced content management system based on Ruby on Rails 4.</li>
<li><a
href="https://github.com/comfy/comfortable-mexican-sofa">ComfortableMexicanSofa</a>
- Powerful Rails 5.2+ CMS Engine.</li>
<li><a href="https://github.com/wearefine/fae">Fae</a> - Flexible, open
source, Rails CMS engine.</li>
<li><a href="https://www.maglev.dev">MaglevCMS</a> - An open source page
builder with an sleek UI.</li>
<li><a href="https://www.locomotivecms.com">LocomotiveCMS</a> - A simple
but powerful CMS based on Liquid templates and Mongodb database.</li>
<li><a href="https://github.com/publify/publify">Publify</a> - A self
hosted Web publishing platform on Rails.</li>
<li><a href="http://www.pushtype.org/">PushType</a> - A next generation,
open source content management system for Ruby on Rails.</li>
<li><a href="http://radiantcms.org">Radiant</a> - A no-fluff, open
source content management system designed for small teams.</li>
<li><a href="https://www.refinerycms.com">Refinery CMS</a> - An open
source Ruby on Rails content management system for Rails 5.2+.</li>
<li><a href="https://sitepress.cc/">Sitepress</a> - Manage content files
in Rails with the same features you’d expect from static site generators
like Jekyll, Middleman, and Bridgetown.</li>
<li><a href="https://www.spinacms.com">Spina CMS</a> - A beautiful CMS
for Rails developers.</li>
<li><a href="https://github.com/CultivateLabs/storytime">Storytime</a> -
Rails 4+ CMS and blogging engine, with a core focus on content.</li>
</ul>
<h2 id="code-analysis-and-metrics">Code Analysis and Metrics</h2>
<ul>
<li><a href="https://github.com/presidentbeef/brakeman">Brakeman</a> - A
static analysis security vulnerability scanner for Ruby on Rails
applications.</li>
<li><a href="https://github.com/danmayer/coverband">Coverband</a> - Rack
middleware to help measure production code coverage.</li>
<li><a href="https://github.com/DamirSvrtan/fasterer">Fasterer</a> -
Make your Rubies go faster with this command line tool highly inspired
by fast-ruby and Sferik’s talk at Baruco Conf.</li>
<li><a href="https://github.com/seattlerb/flay">Flay</a> - Flay analyzes
code for structural similarities. Differences in literal values,
variable, class, method names, whitespace, programming style, braces vs
do/end, etc are all ignored. Making this totally rad.</li>
<li><a href="https://github.com/seattlerb/flog">Flog</a> - Flog reports
the most tortured code in an easy to read pain report. The higher the
score, the more pain the code is in.</li>
<li><a
href="https://gitlab.com/coraline/fukuzatsu#fukuzatsu">fukuzatsu</a> -
Complexity analysis tool with a rich web front-end.</li>
<li><a href="https://github.com/metricfu/metric_fu">MetricFu</a> - A
fist full of code metrics.</li>
<li><a href="https://github.com/tcopeland/pippi">Pippi</a> - A utility
for finding suboptimal Ruby class API usage, focused on runtime
analysis.</li>
<li><a href="https://github.com/mmozuras/pronto">Pronto</a> - Quick
automated code review of your changes.</li>
<li><a
href="https://github.com/railsbp/rails_best_practices">rails_best_practices</a>
- A code metric tool for rails projects.</li>
<li><a href="https://github.com/troessner/reek">Reek</a> - Code smell
detector for Ruby.</li>
<li><a href="https://github.com/whitesmith/rubycritic">Rubycritic</a> -
A Ruby code quality reporter.</li>
<li><a href="https://github.com/github/scientist">Scientist</a> - A Ruby
library for carefully refactoring critical paths.</li>
<li><a href="https://github.com/colszowka/simplecov">SimpleCov</a> -
Code coverage for Ruby 1.9+ with a powerful configuration library and
automatic merging of coverage across test suites.</li>
<li><a href="https://github.com/sorbet/sorbet">Sorbet</a> - A static
type checker for Ruby.</li>
<li><a href="https://github.com/testdouble/suture">Suture</a> - A Ruby
gem that helps you refactor your legacy code.</li>
<li><a href="https://github.com/amatsuda/traceroute">Traceroute</a> - A
Rake task gem that helps you find the dead routes and actions for your
Rails 3+ app</li>
</ul>
<h2 id="code-formatting">Code Formatting</h2>
<ul>
<li><a href="https://github.com/alekseyl/niceql">niceql</a> - A
dependentless SQL and SQL errors formatting and colorizing. ActiveRecord
seemless integration.</li>
<li><a href="https://github.com/prettier/plugin-ruby">prettier</a> - A
prettier plugin for the Ruby language.</li>
<li><a href="https://github.com/rubocop-hq/rubocop">RuboCop</a> - A
static code analyzer, based on the community Ruby style guide.
<ul>
<li><a href="https://github.com/rubocop-hq/rubocop-rails">Rubocop
Rails</a> - A RuboCop extension focused on enforcing Rails best
practices and coding conventions.</li>
<li><a href="https://github.com/rubocop-hq/rubocop-rspec">Rubocop
Rspec</a> - Code style checking for RSpec files</li>
<li><a href="https://github.com/rubocop-hq/rubocop-performance">Rubocop
Performance</a> - A RuboCop extension focused on code performance
checks.</li>
</ul></li>
<li><a href="https://github.com/testdouble/standard">Standard</a> - Ruby
Style Guide, with linter &amp; automatic code fixer</li>
</ul>
<h2 id="code-highlighting">Code Highlighting</h2>
<ul>
<li><a href="https://github.com/rubychan/coderay">CodeRay</a> - Fast and
easy syntax highlighting for selected languages.</li>
<li><a href="https://github.com/tmm1/pygments.rb">pygments.rb</a> - A
Ruby wrapper for the Python pygments syntax highlighter.</li>
<li><a href="https://github.com/jneen/rouge">Rouge</a> - A pure Ruby
code highlighter that is compatible with Pygments.</li>
</ul>
<h2 id="code-loaders">Code Loaders</h2>
<ul>
<li><a href="https://github.com/fxn/zeitwerk">Zeitwerk</a> - An
efficient and thread-safe Ruby code loader.</li>
</ul>
<h2 id="coding-style-guides">Coding Style Guides</h2>
<ul>
<li><a href="https://github.com/franzejr/best-ruby">Best-Ruby</a> - Ruby
Tricks, Idiomatic Ruby, Refactoring &amp; Best Practices.</li>
<li><a href="https://github.com/JuanitoFatas/fast-ruby">fast-ruby</a> -
Writing Fast Ruby. Collect Common Ruby idioms.</li>
<li><a
href="https://github.com/khusnetdinov/ruby.fundamental">Fundamental
Ruby</a> - Fundamental programming ruby with examples. Threads, design
patterns, data structures, OOP SOLID principle, algorithms.</li>
<li><a href="https://github.com/bbatsov/rails-style-guide">Rails style
guide</a> - Community-driven Rails best practices and style for Rails 3
and 4.</li>
<li><a href="https://github.com/andreareginato/betterspecs">RSpec style
guide</a> - Better Specs { rspec guidelines with ruby }.</li>
<li><a href="http://ruby-operators.herokuapp.com/">Ruby Operators</a> -
A webpage showing awesome names for different Ruby operators.</li>
<li><a href="https://github.com/bbatsov/ruby-style-guide">Ruby style
guide</a> - Community-driven Ruby coding style.</li>
</ul>
<h2 id="concurrency-and-parallelism">Concurrency and Parallelism</h2>
<ul>
<li><a
href="https://github.com/ruby-concurrency/concurrent-ruby">Concurrent
Ruby</a> - Modern concurrency tools including agents, futures, promises,
thread pools, supervisors, and more. Inspired by Erlang, Clojure, Scala,
Go, Java, JavaScript, and classic concurrency patterns.</li>
<li><a
href="https://github.com/eventmachine/eventmachine">EventMachine</a> -
An event-driven I/O and lightweight concurrency library for Ruby.</li>
<li><a href="https://github.com/ahoward/forkoff">forkoff</a> -
brain-dead simple parallel processing for ruby.</li>
<li><a href="https://github.com/grosser/parallel">Parallel</a> - Run any
code in parallel Processes (&gt; use all CPUs) or Threads (&gt; speedup
blocking operations). Best suited for map-reduce or e.g. parallel
downloads/uploads.</li>
<li><a href="https://github.com/digital-fabric/polyphony">Polyphony</a>
- Fine-grained concurrency for Ruby.</li>
</ul>
<h2 id="configuration">Configuration</h2>
<ul>
<li><a href="https://github.com/palkan/anyway_config">AnywayConfig</a> -
Configuration library for Ruby gems and applications, supporting
multiple sources (yml, secrets) and environments.</li>
<li><a href="https://github.com/thekompanee/chamber">Chamber</a> -
Surprisingly customizable convention-based approach to managing your
app’s configuration.</li>
<li><a href="https://github.com/markbates/configatron">Configatron</a> -
Simple and feature rich configuration system for Ruby apps.</li>
<li><a href="https://github.com/kaize/configus">Configus</a> - Helps you
easily manage environment specific settings.</li>
<li><a href="https://github.com/bkeepers/dotenv">dotenv</a> - Loads
environment variables from <code>.env</code>.</li>
<li><a href="https://github.com/elabs/econfig">Econfig</a> - Flexible
configuration for Rails applications.</li>
<li><a href="https://github.com/eval/envied">ENVied</a> - ensure
presence and type of your app’s ENV-variables</li>
<li><a href="https://github.com/philnash/envyable">Envyable</a> - The
simplest YAML to ENV config loader.</li>
<li><a href="https://github.com/laserlemon/figaro">Figaro</a> - Simple,
Heroku-friendly Rails app configuration using <code>ENV</code> and a
single YAML file.</li>
<li><a href="https://github.com/railsware/global">Global</a> - Provides
accessor methods for your configuration data.</li>
<li><a href="https://github.com/railsconfig/config">RailsConfig</a> -
Multi-environment yaml settings for Rails3.</li>
<li><a href="https://github.com/vinistock/sail">Sail</a> - A lightweight
Rails engine that brings an admin panel for managing configuration
settings on a live Rails app.</li>
</ul>
<h2 id="core-extensions">Core Extensions</h2>
<ul>
<li><a
href="https://github.com/rails/rails/tree/master/activesupport">ActiveSupport</a>
- A collection of utility classes and standard library extensions.</li>
<li><a href="https://github.com/sporkmonger/addressable">Addressable</a>
- Addressable is a replacement for the URI implementation that is part
of Ruby’s standard library. It more closely conforms to RFC 3986, RFC
3987, and RFC 6570 (level 4), providing support for IRIs and URI
templates.</li>
<li><a href="https://github.com/kenn/bitwise">Bitwise</a> - Fast, memory
efficient bitwise operations on large binary strings</li>
<li><a href="https://github.com/forgecrafted/finishing_moves">Finishing
Moves</a> - Small, focused, incredibly useful methods added to core Ruby
classes. Includes the endlessly useful <code>nil_chain</code>.</li>
<li><a href="https://github.com/ms-ati/docile">Docile</a> - A tiny
library that lets you map a DSL (domain specific language) to your Ruby
objects in a snap.</li>
<li><a href="https://github.com/dry-rb">dry-rb</a> - dry-rb is a
collection of next-generation Ruby libraries, each intended to
encapsulate a common task.</li>
<li><a href="https://github.com/hamstergem/hamster">Hamster</a> -
Efficient, immutable, and thread-safe collection classes for Ruby.</li>
<li><a href="https://github.com/hanami/utils">Hanami::Utils</a> -
Lightweight, non-monkey-patch class utilities for Hanami and Ruby
app.</li>
<li><a href="https://github.com/panorama-ed/memo_wise">MemoWise</a> -
Memoize any instance/class/module method, including support for frozen
objects - rigorously tested and benchmarked on all Rubies - fast
performance of memoized reads.</li>
<li><a href="https://github.com/rubyworks/facets">Ruby Facets</a> - The
premiere collection of general purpose method extensions and standard
additions for Ruby.</li>
<li><a href="https://github.com/keithrbennett/trick_bag">Trick Bag</a> -
Assorted Ruby classes and methods to simplify and enhance your
code.</li>
<li>Attributes
<ul>
<li><a href="https://github.com/cgriego/active_attr">ActiveAttr</a> -
What ActiveModel left out.</li>
<li><a href="https://github.com/solnic/virtus">Virtus</a> - Attributes
on Steroids for Plain Old Ruby Objects.</li>
<li><a href="https://github.com/barsoom/attr_extras">AttrExtras</a> -
Takes some boilerplate out of Ruby with methods like
attr_initialize.</li>
</ul></li>
<li>Hash
<ul>
<li><a href="https://github.com/intridea/hashie">Hashie</a> - A
collection of tools that extend Hashes and make them more useful.</li>
</ul></li>
<li>String
<ul>
<li><a
href="https://github.com/MarioRuiz/string_pattern">string_pattern</a> -
Generate strings supplying a simple pattern.</li>
</ul></li>
</ul>
<h2 id="country-data">Country Data</h2>
<ul>
<li><a href="https://github.com/jim/carmen">Carmen</a> - A repository of
geographic regions.</li>
<li><a href="https://github.com/hexorx/countries">Countries</a> - All
sorts of useful information about every country packaged as pretty
little country objects.</li>
<li><a href="https://github.com/grosser/i18n_data">i18n_data</a> -
country/language names and 2-letter-code pairs, in 85 languages, for
country/language i18n.</li>
<li><a
href="https://github.com/sshaw/normalize_country">normalize_country</a>
- Convert country names and codes to a standard, includes a conversion
program for XMLs, CSVs and DBs.</li>
<li><a href="https://github.com/daddyz/phonelib">Phonelib</a> - Ruby gem
for phone validation and formatting using Google libphonenumber library
data.</li>
<li><a href="https://github.com/floere/phony">Phony</a> - Fast
international phone number (E164 standard) normalizing, splitting and
formatting.</li>
<li><a
href="https://github.com/dgilperez/validates_zipcode">validates_zipcode</a>
- Postal code / zipcode validation for Rails, supporting 233 country
codes.</li>
</ul>
<h2 id="crm">CRM</h2>
<ul>
<li><a href="https://github.com/fatfreecrm/fat_free_crm">Fat Free
CRM</a> - An open source Ruby on Rails based customer relationship
management platform.</li>
<li><a href="https://github.com/hitobito/hitobito">Hitobito</a> - An
open source Ruby on Rails based community management solution.</li>
</ul>
<h2 id="cryptocurrencies-and-blockchains">Cryptocurrencies and
Blockchains</h2>
<ul>
<li><a
href="https://github.com/openblockchains/blockchain.lite.rb">Blockchain
Lite</a> - Build your own blockchains with crypto hashes; revolutionize
the world with blockchains, blockchains, blockchains one block at a
time.</li>
<li><a href="https://github.com/ciri-ethereum/ciri">Ciri</a> - Ruby
implementation of Ethereum.</li>
<li><a href="https://github.com/GemHQ/money-tree">MoneyTree</a> - A Ruby
implementation of Bitcoin HD Wallets (Hierarchical Deterministic)
BIP32.</li>
<li><a href="https://github.com/rubykube/peatio">Peatio</a> - Most
Advanced Cryptocurrency open-source assets exchange.</li>
</ul>
<h2 id="dashboards">Dashboards</h2>
<ul>
<li><a href="https://github.com/ankane/blazer">Blazer</a> - Simple data
viewer using only SQL. Output to table, chart, and maps.</li>
<li><a href="https://smashing.github.io/">Smashing</a> - Smashing is a
Sinatra based framework that lets you build beautiful dashboards. This
project is the maintained spiritual successor to the Dashing
framework.</li>
<li><a
href="https://github.com/gottfrois/dashing-rails">Dashing-Rails</a> -
The exceptionally handsome dashboard framework for Rails.</li>
</ul>
<h2 id="data-processing-and-etl">Data Processing and ETL</h2>
<ul>
<li><a href="https://github.com/ianks/attr-gather">attr-gather</a> - A
gem for creating workflows that “enhance” entities with extra
attributes. At a high level, attr-gather provides a process to fetch
information from many data sources (such as third party APIs, legacy
databases, etc.) in a fully parallelized fashion.</li>
<li><a href="https://github.com/csvreader/csvreader">CSV Reader</a> - A
modern tabular data (line-by-line records) reader supports “classic” CSV
but also CSV Numerics, <code>CSV &lt;3 JSON</code>,
<code>CSV &lt;3 YAML</code>, tab, space or fixed width fields (FWF) and
many more flavors and dialects.</li>
<li><a
href="https://github.com/thisismydesign/json-streamer">json-streamer</a>
- Stream JSON data based on various criteria (key, nesting level,
etc).</li>
<li><a href="http://www.kiba-etl.org">Kiba</a> - A lightweight data
processing / ETL framework for Ruby.</li>
<li><a href="https://github.com/Multiwoven/multiwoven">Multiwoven</a> -
The open-source reverse ETL, data activation platform developed using
Ruby and Ruby on Rails.</li>
<li><a href="https://github.com/aurelian/ruby-stemmer">ruby-stemmer</a>
- It Provides Snowball algorithm for stemming purposes.</li>
</ul>
<h2 id="data-visualization">Data Visualization</h2>
<ul>
<li><a href="http://chartkick.com/">Chartkick</a> - Create beautiful
Javascript charts with one line of Ruby.</li>
<li><a href="https://github.com/jasonlong/geo_pattern">GeoPattern</a> -
Create beautiful generative geometric background images from a
string.</li>
<li><a
href="https://github.com/michelson/lazy_high_charts">LazyHighCharts</a>
- A simple and extremely flexible way to use HighCharts from ruby code.
Tested on Ruby on Rails, Sinatra and Nanoc, but it should work with
others too.</li>
<li><a href="https://github.com/styd/apexcharts.rb">ApexCharts.rb</a> -
Awesome charts for your ruby app. Works on any ruby app, including Rails
app. It even works on plain HTML+ERB files.</li>
<li><a href="https://github.com/preston/railroady">RailRoady</a> - Ruby
on Rails 3/4 model and controller UML class diagram generator.</li>
<li><a href="https://github.com/voormedia/rails-erd">Rails Erd</a> -
Generate Entity-Relationship Diagrams for Rails applications.</li>
<li><a
href="https://github.com/glejeune/Ruby-Graphviz">Ruby/GraphViz</a> -
Ruby interface to the GraphViz graphing tool.</li>
</ul>
<h2 id="database-drivers">Database Drivers</h2>
<ul>
<li><a href="https://github.com/datastax/ruby-driver">Cassandra
Driver</a> - A pure ruby driver for Apache Cassandra with asynchronous
io and configurable load balancing, reconnection and retry
policies.</li>
<li><a
href="https://github.com/mongodb/mongo-ruby-driver">mongo-ruby-driver</a>
- MongoDB Ruby driver.</li>
<li><a href="https://github.com/brianmario/mysql2">mysql2</a> - A
modern, simple and very fast Mysql library for Ruby (binding to
libmysql).</li>
<li><a href="https://github.com/maxdemarzi/neography">Neography</a> - A
thin Ruby wrapper to the Neo4j Rest API.</li>
<li><a href="https://github.com/amakawa/redic">Redic</a> - Lightweight
Redis Client.</li>
<li><a href="https://github.com/redis/redis-rb">redis-rb</a> - A Ruby
client that tries to match Redis’ API one-to-one, while still providing
an idiomatic interface.</li>
<li><a href="https://github.com/ged/ruby-pg">ruby-pg</a> - Ruby
interface to PostgreSQL 8.3 and later.</li>
<li><a href="https://github.com/sparklemotion/sqlite3-ruby">SQLite3</a>
- Ruby bindings for the SQLite3 embedded database.</li>
<li><a
href="https://github.com/rails-sqlserver/activerecord-sqlserver-adapter">SQL
Server</a> - The SQL Server adapter for ActiveRecord.</li>
<li><a href="https://github.com/rails-sqlserver/tiny_tds">TinyTDS</a> -
FreeTDS bindings for Ruby using DB-Library.</li>
<li><a href="https://github.com/trilogy-libraries/trilogy">Trilogy</a> -
A performance-oriented C library for MySQL-compatible databases.</li>
</ul>
<h2 id="database-tools">Database Tools</h2>
<ul>
<li><a
href="https://github.com/mperham/connection_pool">connection_pool</a> -
Generic connection pooling for Ruby, that can be used with anything,
e.g. Redis, Dalli, etc.</li>
<li><a
href="https://github.com/DatabaseCleaner/database_cleaner">Database
Cleaner</a> - Database Cleaner is a set of strategies for cleaning your
database in Ruby.</li>
<li><a href="https://github.com/djezzzl/database_consistency">Database
Consistency</a> - An easy way to check that application constraints and
database constraints are in sync.</li>
<li><a href="https://github.com/matthuhiggins/foreigner">Foreigner</a> -
Adds foreign key helpers to migrations and correctly dumps foreign keys
to schema.rb.</li>
<li><a href="https://github.com/soundcloud/lhm">Large Hadron
Migrator</a> - Online MySQL schema migrations without locking the
table.</li>
<li><a href="https://github.com/plentz/lol_dba">Lol DBA</a> - Scan your
models and displays a list of columns that probably should be
indexed.</li>
<li><a href="https://github.com/fatkodima/online_migrations">Online
Migrations</a> - Catch unsafe PostgreSQL migrations in development and
run them easier in production.</li>
<li><a href="https://github.com/IFTTT/polo">Polo</a> - Creates sample
database snapshots to work with real world data in development.</li>
<li><a href="https://github.com/ankane/pghero">PgHero</a> - Postgres
insights made easy.</li>
<li><a href="https://github.com/igorkasyanchuk/rails_db">Rails DB</a> -
Database Viewer and SQL Query Runner.</li>
<li><a href="https://github.com/nullobject/rein">Rein</a> - Database
constraints made easy for ActiveRecord.</li>
<li><a href="https://github.com/thoughtbot/scenic">Scenic</a> -
Versioned database views for Rails.</li>
<li><a href="https://github.com/SchemaPlus/schema_plus">SchemaPlus</a> -
SchemaPlus provides a collection of enhancements and extensions to
ActiveRecord</li>
<li><a href="https://github.com/customink/secondbase">SecondBase</a> -
Seamless second database integration for Rails. SecondBase provides
support for Rails to manage dual databases by extending ActiveRecord
tasks that create, migrate, and test your application.</li>
<li><a href="https://github.com/james2m/seedbank">Seedbank</a> -
Seedbank allows you to structure your Rails seed data instead of having
it all dumped into one large file.</li>
<li><a href="https://github.com/rroblak/seed_dump">Seed dump</a> - Rails
4 task to dump (parts) of your database to db/seeds.rb.</li>
<li><a href="https://github.com/mbleigh/seed-fu">Seed Fu</a> - Advanced
seed data handling for Rails.</li>
<li><a href="https://github.com/kenn/standby">Standby</a> - Read from
standby databases for ActiveRecord (formerly Slavery).</li>
<li><a href="https://github.com/ankane/strong_migrations">Strong
Migrations</a> - Catch unsafe migrations in development.</li>
<li><a href="https://github.com/seamusabshere/upsert">Upsert</a> -
Upsert on MySQL, PostgreSQL, and SQLite3. Transparently creates
functions (UDF) for MySQL and PostgreSQL; on SQLite3, uses INSERT OR
IGNORE.</li>
</ul>
<h2 id="date-and-time-processing">Date and Time Processing</h2>
<ul>
<li><a href="https://github.com/zendesk/biz">biz</a> - Time calculations
using business hours.</li>
<li><a href="https://github.com/bokmann/business_time">business_time</a>
- Support for doing time math in business hours and days.</li>
<li><a href="https://github.com/radar/by_star">ByStar</a> - Find
ActiveRecord objects by year, month, fortnight, week and more!</li>
<li><a href="https://github.com/mojombo/chronic">Chronic</a> - A natural
language date/time parser written in pure Ruby.</li>
<li><a
href="https://github.com/darkleaf/date_range_formatter">date_range_formatter</a>
- The simple tool to make work with date ranges in Ruby more
enjoyable.</li>
<li><a href="https://github.com/ankane/groupdate">groupdate</a> - The
simplest way to group temporal data in ActiveRecord, arrays and
hashes.</li>
<li><a href="https://github.com/holidays/holidays">holidays</a> - A
collection of Ruby methods to deal with statutory and other
holidays.</li>
<li><a href="https://github.com/seejohnrun/ice_cube">ice_cube</a> - A
date recurrence library which allows easy creation of recurrence rules
and fast querying.</li>
<li><a href="https://github.com/basecamp/local_time">local_time</a> -
Rails Engine for cache-friendly, client-side local time.</li>
<li><a href="https://github.com/rossta/montrose">montrose</a> - a simple
library for expressing, serializing, and enumerating recurring events in
Ruby.</li>
<li><a href="https://github.com/jeremyw/stamp">stamp</a> - Format dates
and times based on human-friendly examples, not arcane strftime
directives.</li>
<li><a href="https://github.com/abhidsm/time_diff">time_diff</a> -
Calculates the difference between two time.</li>
<li><a href="https://github.com/panthomakos/timezone">timezone</a> -
Accurate current and historical timezones and transformations, with
support for Geonames and Google latitude - longitude timezone
lookups.</li>
<li><a href="https://github.com/tzinfo/tzinfo">TZinfo</a> - Provides
daylight savings aware transformations between times in different
timezones.</li>
<li><a
href="https://github.com/adzap/validates_timeliness">validates_timeliness</a>
- Date and time validation plugin for ActiveModel and Rails.</li>
<li><a
href="https://github.com/intrepidd/working_hours">working_hours</a> - A
modern ruby gem allowing to do time calculation with working hours.</li>
<li><a href="https://github.com/sshaw/yymmdd">yymmdd</a> - Tiny DSL for
idiomatic date parsing and formatting.</li>
</ul>
<h2 id="debugging-tools">Debugging Tools</h2>
<ul>
<li><a href="https://github.com/deivid-rodriguez/byebug">Byebug</a> - A
simple to use, feature rich debugger for Ruby 2.</li>
<li><a href="https://github.com/yuki24/did_you_mean">did_you_mean</a> -
Adds class, method &amp; attribute suggestions to error messages.</li>
<li><a href="https://github.com/deivid-rodriguez/pry-byebug">Pry
Byebug</a> - Pry navigation commands via byebug.</li>
<li><a href="https://github.com/rweng/pry-rails">pry-rails</a> - Avoid
repeating yourself, use pry-rails instead of copying the initializer to
every rails project. This is a small gem which causes rails console to
open pry. It therefore depends on pry.</li>
<li><a href="https://github.com/JoshCheek/seeing_is_believing">Seeing Is
Believing</a> - Displays the results of every line of code in your
file.</li>
<li><a
href="https://github.com/st0012/tapping_device">tapping_device</a> - A
tool that allows you to inspect your program from an Object’s
perspective.</li>
<li><a href="https://github.com/brentd/xray-rails">Xray</a> - A
development tool that reveals your UI’s bones.</li>
</ul>
<h2 id="decorators">Decorators</h2>
<ul>
<li><a href="https://github.com/drapergem/draper">Draper</a> - Draper
adds an object-oriented layer of presentation logic to your Rails
application.</li>
<li><a href="https://github.com/hashrocket/decent_exposure">Decent
Exposure</a> - A helper for creating declarative interfaces in
controllers.</li>
<li><a href="https://github.com/heartcombo/responders">Responders</a> -
A set of Rails responders to dry up your application.</li>
<li><a href="https://github.com/heartcombo/show_for">ShowFor</a> -
Quickly show a model information with I18n features. Like form_for for
displaying model data.</li>
</ul>
<h2 id="devops-tools">DevOps Tools</h2>
<ul>
<li><a href="https://github.com/backup/backup">Backup</a> - Provides an
elegant DSL in Ruby for performing backups on UNIX-like systems.</li>
<li><a href="https://github.com/cloudfoundry/bosh">BOSH</a> - Cloud
Foundry BOSH is an open source tool chain for release engineering,
deployment and lifecycle management of large scale distributed
services.</li>
<li><a href="http://capistranorb.com">Capistrano</a> - A remote server
automation and deployment tool written in Ruby.</li>
<li><a href="https://github.com/newrelic/centurion">Centurion</a> - A
mass deployment tool for Docker fleets.</li>
<li><a href="https://github.com/chef/chef">Chef</a> - A systems
integration framework, built to bring the benefits of configuration
management to your entire infrastructure.</li>
<li><a href="https://github.com/stripe/einhorn">Einhorn</a> - Einhorn
will open one or more shared sockets and run multiple copies of your
process. You can seamlessly reload your code, dynamically reconfigure
Einhorn, and more.</li>
<li><a href="https://github.com/itamae-kitchen/itamae">Itamae</a> -
Simple and lightweight configuration management tool inspired by
Chef.</li>
<li><a href="https://github.com/avamia/kanrisuru">Kanrisuru</a> - Manage
remote infrastructure in Ruby</li>
<li><a href="https://www.lita.io/">Lita</a> - ChatOps for Ruby: A
pluggable chat bot framework usable with any chat service.</li>
<li><a href="https://github.com/elastic/logstash">Logstash</a> -
Logs/event transport, processing, management, search.</li>
<li><a href="https://github.com/basecamp/kamal">Kamal</a> - Kamal offers
zero-downtime deploys, rolling restarts, asset bridging, remote builds,
accessory service management, and everything else you need to deploy and
manage your web app in production with Docker.</li>
<li><a href="https://github.com/mina-deploy/mina">Mina</a> - Really fast
deployer and server automation tool.</li>
<li><a href="https://github.com/puppetlabs/puppet">Puppet</a> - An
automated administrative engine for your Linux, Unix, and Windows
systems, performs administrative tasks (such as adding users, installing
packages, and updating server configurations) based on a centralized
specification.</li>
<li><a href="https://github.com/rubber/rubber">Rubber</a> - The rubber
plugin enables relatively complex multi-instance deployments of
RubyOnRails applications to Amazon’s Elastic Compute Cloud (EC2).</li>
<li><a href="https://github.com/bensie/sshkey">SSHKey</a> - SSH private
and public key generator in pure Ruby (RSA &amp; DSA).</li>
<li><a href="https://github.com/kenn/sunzi">Sunzi</a> - Server
provisioning utility for minimalists</li>
<li><a href="https://github.com/lxc/ruby-lxc">Ruby-LXC</a> - Native ruby
binding for Linux containers.</li>
<li><a href="http://www.vagrantup.com">Vagrant</a> - Create and
configure lightweight, reproducible, and portable development
environments.</li>
</ul>
<h2 id="diff">Diff</h2>
<ul>
<li><a href="https://github.com/samg/diffy">Diffy</a> - Easy Diffing
With Ruby.</li>
<li><a href="https://github.com/teeparham/gemdiff">gemdiff</a> - Find
source repositories for gems. Open, compare, and update outdated gem
versions.</li>
<li><a
href="https://github.com/a2design-inc/json-compare">JsonCompare</a> -
Returns the difference between two JSON files.</li>
</ul>
<h2 id="discover">Discover</h2>
<p>Where to discover new Ruby libraries, projects and trends.</p>
<ul>
<li><a href="https://ruby.libhunt.com">Awesome Ruby <span
class="citation" data-cites="LibHunt">@LibHunt</span></a> - Your go-to
Ruby Toolbox. The Awesome Ruby collection + ordering by popularity,
additional metadata and comparisons.</li>
<li><a href="https://github.com/trending?l=ruby">GitHub Trending</a> -
Find what repositories the GitHub community is most excited about
today.</li>
<li><a href="https://www.opensourcerails.org/">Open Source Rails</a> - A
gallery of the best open source rack and Ruby on Rails web
applications.</li>
<li><a href="https://github.com/dreikanter/ruby-bookmarks">Ruby
Bookmarks</a> - Ruby and Ruby on Rails bookmarks collection.</li>
<li><a href="http://rubydaily.org">RubyDaily</a> - Community driven
news.</li>
<li><a href="http://www.rubyflow.com">RubyFlow</a> - Ruby Programming
Community Link Blog.</li>
<li><a href="http://rubyland.news/">Ruby Land</a> - A well maintained
Ruby/Rails aggregator that contains news, opinions, tutorials, and
more.</li>
<li><a href="https://devchat.tv/ruby-rogues">Ruby Rogues</a> - Weekly
panel discussion about programming, primarily in Ruby.</li>
<li><a href="https://rubyweekly.com/">Ruby Weekly</a> - A free,
once–weekly e-mail round-up of Ruby news and articles.</li>
<li><a href="https://rubybib.org">The Ruby Bibliography</a> - Research
papers about Ruby.</li>
<li><a href="https://www.ruby-toolbox.com">The Ruby Toolbox</a> - A
comprehensive catalog of Ruby and Rails plug-ins, gems, tools and
resources for Ruby developers with popularity ratings based on GitHub
watchers and Gem downloads.</li>
</ul>
<h2 id="documentation">Documentation</h2>
<ul>
<li><a href="https://github.com/drwl/annotaterb">AnnotateRb</a> - Adds
database schema annotations for your ActiveRecord models as text
comments as well as routes. An active and maintained hard fork of
Annotate.</li>
<li><a href="https://github.com/Apipie/apipie-rails">Apipie</a> - Rails
API documentation and display tool using Ruby syntax.</li>
<li><a href="https://asciidoctor.org">Asciidoctor</a> - A fast,
Ruby-based text processor &amp; publishing toolchain for converting
AsciiDoc to HTML5, DocBook, EPUB3, PDF &amp; more.</li>
<li><a
href="https://github.com/adamcooke/documentation">Documentation</a> - A
Rails engine to provide the ability to add documentation to a Rails
application.</li>
<li><a href="https://github.com/tuwilof/fitting">fitting</a> - Library
add improve test log for RSpec and WebMock, validate its according to
API Blueprint and Open API, show the documentation coverage with
log.</li>
<li><a
href="https://github.com/github-changelog-generator/github-changelog-generator">GitHub
Changelog Generator</a> - Automatically generate change log from your
tags, issues, labels and pull requests on GitHub.</li>
<li><a href="https://github.com/gollum/gollum">Gollum</a> - A simple,
Git-powered wiki with a sweet API and local frontend.</li>
<li><a
href="https://github.com/ruby-grape/grape-swagger">grape-swagger</a> -
Add swagger compliant documentation to your Grape API.</li>
<li><a href="https://github.com/rdoc/hanna-nouveau">Hanna</a> - An RDoc
formatter built with simplicity, beauty and ease of browsing in
mind.</li>
<li><a href="https://github.com/trulia/hologram">Hologram</a> - A
markdown based documentation system for style guides. It parses comments
in your CSS and helps you turn them into a beautiful style guide.</li>
<li><a href="https://github.com/rrrene/inch">Inch</a> - Inch is a
documentation measurement and evalutation tool for Ruby code, based on
YARD.</li>
<li><a href="https://github.com/ruby/rdoc">RDoc</a> - RDoc produces HTML
and command-line documentation for Ruby projects.</li>
<li><a
href="https://github.com/zipmark/rspec_api_documentation">rspec_api_documentation</a>
- Automatically generate API documentation from RSpec.</li>
<li><a href="http://yardoc.org">YARD</a> - YARD enables the user to
generate consistent, usable documentation that can be exported to a
number of formats very easily.</li>
</ul>
<h2 id="e-commerce-and-payments">E-Commerce and Payments</h2>
<ul>
<li><a href="https://github.com/activemerchant/active_merchant">Active
Merchant</a> - A simple payment abstraction library extracted from
Shopify.</li>
<li><a href="https://github.com/braintree/braintree_ruby">Braintree</a>
- Braintree Ruby bindings.</li>
<li><a href="https://github.com/conekta/conekta-ruby">Conekta</a> -
Conekta Ruby bindings.</li>
<li><a
href="https://github.com/didww/credit_card_validations">credit_card_validations</a>
- A ruby gem for validating credit card numbers, generating valid
numbers, Luhn checks.</li>
<li><a href="https://github.com/paypal/merchant-sdk-ruby">Paypal
Merchant SDK</a> - Official Paypal Merchant SDK for Ruby.</li>
<li><a href="https://github.com/drhenner/ror_ecommerce">ROR
Ecommerce</a> - A Rails e-commerce platform.</li>
<li><a href="https://github.com/solidusio/solidus">Solidus</a> - An open
source, eCommerce application for high volume retailers.</li>
<li><a href="https://github.com/spree/spree">Spree</a> - Spree is a
complete open source e-commerce solution for Ruby on Rails.</li>
<li><a
href="https://github.com/square/connect-ruby-sdk">SquareConnect</a> -
Square’s SDK for payments and other Square APIs.</li>
<li><a href="https://github.com/stripe/stripe-ruby">stripe-ruby</a> -
Stripe Ruby bindings.</li>
<li><a href="https://github.com/workarea-commerce/workarea">Workarea</a>
- An extensible, high-performance eCommerce platform depended on by some
of the world’s top retailers.</li>
</ul>
<h2 id="ebook">Ebook</h2>
<ul>
<li><a href="https://github.com/worlduniting/bookshop">Bookshop</a> -
Bookshop is a an open-source agile book development and publishing
framework for authors, editors.</li>
<li><a href="https://github.com/skoji/gepub">Gepub</a> - A generic EPUB
library for Ruby : supports EPUB 3.</li>
<li><a href="https://github.com/jkongie/mobi">Mobi</a> - A Ruby way to
read MOBI format metadata.</li>
<li><a href="https://github.com/kmuto/review">Review</a> - Re:VIEW is
flexible document format/conversion system.</li>
</ul>
<h2 id="email">Email</h2>
<ul>
<li><a href="https://github.com/ankane/ahoy_email">Ahoy Email</a> -
Analytics and tracking for e-mails.</li>
<li><a href="https://github.com/amro/gibbon">Gibbon</a> - API wrapper
for the Mailchimp e-mail marketing platform.</li>
<li><a href="https://github.com/thoughtbot/griddler">Griddler</a> -
Simplify receiving email in Rails.</li>
<li><a href="https://github.com/honeybadger-io/incoming">Incoming</a> -
Incoming! helps you receive email in your Rack apps.</li>
<li><a href="https://github.com/ryanb/letter_opener">LetterOpener</a> -
Preview mail in the browser instead of sending.</li>
<li><a href="https://github.com/mikel/mail">Mail</a> - A Really Ruby
Mail Library.</li>
<li><a href="https://mailcatcher.me">MailCatcher</a> - Catches mail and
serves it through a dream.</li>
<li><a href="https://github.com/heartcombo/mail_form">MailForm</a> -
Send e-mail straight from forms in Rails with I18n, validations,
attachments and request information.</li>
<li><a href="https://github.com/markets/maily">Maily</a> - A Rails
Engine to manage, test and navigate through all your email templates of
your app, being able to preview them directly in your browser.</li>
<li><a
href="https://4commerce-technologies-ag.github.io/midi-smtp-server/">MidiSmtpServer</a>
- The highly customizable ruby SMTP-Service library with builtin support
for AUTH and SSL/STARTTLS, 8BITMIME and SMTPUTF8, IPv4 and IPv6 and
more.</li>
<li><a href="https://github.com/benprew/pony">Pony</a> - The express way
to send mail from Ruby.</li>
<li><a href="https://github.com/atech/postal">Postal</a> - A fully
featured open source mail delivery platform for incoming &amp; outgoing
e-mail.</li>
<li><a
href="https://github.com/fphilipe/premailer-rails">premailer-rails</a> -
CSS styled emails without the hassle.</li>
<li><a href="https://github.com/Mange/roadie">Roadie</a> - Roadie tries
to make sending HTML emails a little less painful by inlining
stylesheets and rewriting relative URLs for you inside your emails.</li>
<li><a href="https://github.com/sup-heliotrope/sup">Sup</a> - A curses
threads-with-tags style email client.</li>
<li><a href="https://truemail-rb.org/truemail-gem">Truemail</a> -
Configurable framework agnostic plain Ruby email validator/verifier.
Verify email via Regex, DNS and SMTP. Be sure that email address valid
and exists.</li>
</ul>
<h2 id="encryption">Encryption</h2>
<ul>
<li><a href="https://github.com/codahale/bcrypt-ruby">bcrypt-ruby</a> -
bcrypt-ruby is a Ruby binding for the OpenBSD bcrypt() password hashing
algorithm.</li>
<li><a href="https://github.com/cryptosphere/rbnacl">RbNaCl</a> - Ruby
binding to the Networking and Cryptography (NaCl) library.</li>
<li><a href="https://github.com/kigster/sym">Sym</a> - A time-saving
symmetric encryption gem based on OpenSSL that uses 256bit
(password-encrypted) keys. Read the key from STDIN, a file, ENV or, on a
Mac: OS-X Keychain.</li>
<li><a href="https://encryption.rocketjob.io/">Symmetric Encryption</a>
- Transparently encrypt ActiveRecord, Mongoid, and MongoMapper
attributes. Encrypt passwords in configuration files. Encrypt entire
files at rest.</li>
<li><a href="https://github.com/cossacklabs/themis">Themis</a> - crypto
library for painless data security, providing symmetric and asymmetric
encryption, secure sockets with forward secrecy, for mobile and server
platforms.</li>
</ul>
<h2 id="environment-management">Environment Management</h2>
<ul>
<li><a href="https://github.com/postmodern/chruby">chruby</a> - Change
your current Ruby. No shims, no crazy options or features, ~90 LOC.</li>
<li><a href="https://github.com/terlar/fry">fry</a> - Simple ruby
version manager for fish.</li>
<li><a href="https://github.com/postmodern/gem_home">gem_home</a> - A
tool for changing your $GEM_HOME.</li>
<li><a href="https://github.com/sstephenson/rbenv">rbenv</a> - Use rbenv
to pick a Ruby version for your application and guarantee that your
development environment matches production.</li>
<li><a href="https://github.com/sstephenson/ruby-build">ruby-build</a> -
Compile and install Ruby.</li>
<li><a
href="https://github.com/postmodern/ruby-install">ruby-install</a> -
Installs Ruby, JRuby, Rubinius, MagLev or MRuby.</li>
<li><a href="https://rvm.io">RVM</a> - RVM is a command-line tool which
allows you to easily install, manage, and work with multiple ruby
environments from interpreters to sets of gems.</li>
<li><a href="https://github.com/tokaido/tokaidoapp/releases">Tokaido</a>
- Ruby, Rails, SQLite and Redis encapsulated in a single drag-and-drop
OS X app, designed to make installing a working RoR environment easy for
beginners.</li>
<li><a href="https://bitbucket.org/jonforums/uru">Uru</a> - Uru is a
lightweight, multi-platform command line tool that helps you use the
multiple rubies on your 32/64-bit Linux, OS X, or Windows systems.</li>
</ul>
<h2 id="error-handling">Error Handling</h2>
<ul>
<li><a href="https://github.com/airbrake/airbrake">Airbrake</a> - The
official Airbrake library for Ruby on Rails (and other Rack based
frameworks).</li>
<li><a href="https://github.com/charliesome/better_errors">Better
Errors</a> - Better error page for Rack apps.</li>
<li><a href="https://github.com/bugsnag/bugsnag-ruby">Bugsnag</a> -
Error monitoring for Rails, Sinatra, Rack, and plain Ruby apps.</li>
<li><a href="https://github.com/errbit/errbit">Errbit</a> - The open
source, self-hosted error catcher.</li>
<li><a href="https://github.com/richpeck/exception_handler">Exception
Handler</a> - Custom error pages.</li>
<li><a
href="https://github.com/smartinez87/exception_notification">Exception
Notification</a> - A set of notifiers for sending notifications when
errors occur in a Rack/Rails application.</li>
<li><a href="https://www.honeybadger.io/">Honeybadger</a> - Exception,
uptime, and performance monitoring for Ruby.</li>
<li><a href="https://github.com/skorks/nesty">Nesty</a> - Nested
exceptions for Ruby.</li>
<li><a href="https://github.com/getsentry/sentry-ruby">Sentry Ruby</a> -
The Ruby client for Sentry.</li>
<li><a href="https://github.com/rollbar/rollbar-gem">Rollbar</a> - Easy
and powerful exception and error tracking for your applications.</li>
</ul>
<h2 id="event-sourcing">Event Sourcing</h2>
<ul>
<li><a href="https://eventide-project.org">Eventide Project</a> -
Pub/sub, event sourcing, and evented autonomous services backed by the
<a href="https://github.com/message-db/message-db">Message DB</a>
message store.</li>
<li><a href="https://github.com/RailsEventStore/rails_event_store">Rails
Event Store (RES)</a> - A library for publishing, consuming, storing and
retrieving events. It’s your best companion for going with an
event-driven architecture for your Rails application.</li>
</ul>
<h2 id="feature-flippers-and-ab-testing">Feature Flippers and A/B
Testing</h2>
<ul>
<li><a href="https://github.com/amatsuda/motorhead">Motorhead</a> - A
Rails Engine framework that helps safe and rapid feature
prototyping.</li>
<li><a href="https://github.com/jnunemaker/flipper">flipper</a> -
Feature flipping for ANYTHING. Make turning features on/off so easy that
everyone does it. Whatever your data store, throughput, or
experience.</li>
<li><a href="https://github.com/FetLife/rollout">Rollout</a> - Feature
flippers.</li>
<li><a href="https://github.com/splitrb/split">Split</a> - Rack Based AB
testing framework.</li>
<li><a href="https://github.com/Unleash/unleash-client-ruby">Unleash</a>
- Ruby client for Unleash, a powerful feature toggle system that gives
you a great overview over all feature toggles across all your
applications and services.</li>
<li><a href="https://github.com/assaf/vanity">Vanity</a> - an A/B
testing framework for Rails that is datastore agnostic.</li>
</ul>
<h2 id="file-upload">File Upload</h2>
<ul>
<li><a href="https://github.com/choonkeat/attache">attache</a> -
Standalone image and file server to decouple your app from file
management concerns.</li>
<li><a
href="https://github.com/carrierwaveuploader/carrierwave">CarrierWave</a>
- Classier solution for file uploads for Rails, Sinatra and other Ruby
web frameworks.</li>
<li><a href="https://github.com/markevans/dragonfly">DragonFly</a> - A
Ruby gem for on-the-fly processing - suitable for image uploading in
Rails, Sinatra and much more!.</li>
<li><a href="https://github.com/thoughtbot/paperclip">PaperClip</a> -
Easy file attachment management for ActiveRecord. Deprecated as of May
14, 2018.</li>
<li><a
href="https://github.com/dtaniwaki/rack-secure-upload">rack-secure-upload</a>
- Upload files securely.</li>
<li><a href="https://github.com/refile/refile">Refile</a> - A modern
file upload library for Ruby applications, Refile is an attempt by
CarrierWave’s original author to fix the design mistakes and
overengineering in CarrierWave.</li>
<li><a href="https://github.com/janko-m/shrine">Shrine</a> - Toolkit for
handling file uploads in Ruby.</li>
</ul>
<h2 id="file-system-listener">File System Listener</h2>
<ul>
<li><a href="https://github.com/guard/guard">Guard</a> - A command line
tool to easily handle events on file system modifications.</li>
<li><a
href="https://github.com/guard/guard-livereload">Guard::LiveReload</a> -
Automatically reload your browser when ‘view’ files are modified.</li>
<li><a href="https://github.com/guard/listen">Listen</a> - The Listen
gem listens to file modifications and notifies you about the
changes.</li>
<li><a href="https://github.com/alexch/rerun">Rerun</a> - Restarts an
app when the filesystem changes. Uses growl and FSEventStream if on OS
X.</li>
<li><a href="https://github.com/alexb52/retest">Retest</a> - A simple
CLI to watch file changes and run their matching Ruby specs. Works on
any ruby projects with no setup.</li>
</ul>
<h2 id="form-builder">Form Builder</h2>
<ul>
<li><a href="https://github.com/nathanvda/cocoon">Cocoon</a> - Dynamic
nested forms using jQuery made easy; works with formtastic, simple_form
or default forms.</li>
<li><a
href="https://github.com/comfy/comfy-bootstrap-form">ComfyBootstrapForm</a>
- Rails form builder that makes it easy to create forms with Bootstrap 4
markup</li>
<li><a href="https://github.com/justinfrench/formtastic">Formtastic</a>
- A Rails form builder plugin with semantically rich and accessible
markup.</li>
<li><a
href="https://github.com/bootstrap-ruby/rails-bootstrap-forms">Rails
Bootstrap Forms</a> - Rails form builder that makes it super easy to
create beautiful-looking forms with Twitter Bootstrap 3+.</li>
<li><a href="https://github.com/code-mancers/rapidfire">Rapidfire</a> -
Making dynamic surveys should be easy!</li>
<li><a href="https://github.com/apotonick/reform">Reform</a> - Gives you
a form object with validations and nested setup of models. It is
completely framework-agnostic and doesn’t care about your database.</li>
<li><a href="https://github.com/heartcombo/simple_form">Simple Form</a>
- Rails forms made easy.</li>
</ul>
<h2 id="game-development-and-graphics">Game Development and
Graphics</h2>
<ul>
<li><a href="https://dragonruby.org/">Dragon Ruby</a> - DragonRuby is a
zero dependency, cross platform, Ruby runtime built on top of mRuby,
libSDL, and LLVM. Write Ruby on any OS and deploy to PC, Mac, Linux,
iOS, Android, Raspberry Pi, WASM, Nintendo Switch, Sony Playstation, and
Microsoft Xbox.</li>
<li><a href="http://www.libgosu.org">Gosu</a> - A 2D game development
library for the Ruby and C++ programming languages.</li>
<li><a href="https://github.com/jellymann/mittsu">Mittsu</a> - Mittsu
makes 3D graphics easier by providing an abstraction over OpenGL, and is
based heavily off of THREE.js.</li>
<li><a href="https://github.com/ruby2d/ruby2d">Ruby 2D</a> - Create
cross-platform 2D applications, games, and visualizations with
ease.</li>
<li><a href="https://github.com/HellRok/Taylor">Taylor</a> - Taylor is a
game engine built using mruby and raylib.</li>
</ul>
<h2 id="gem-generators">Gem Generators</h2>
<ul>
<li><a href="https://github.com/bkuhlmann/gemsmith">Gemsmith</a> - A
command line interface for smithing new Ruby gems.</li>
<li><a href="http://www.zenspider.com/projects/hoe.html">Hoe</a> - Hoe
is a Rake/RubyGems helper for project Rakefiles.</li>
</ul>
<h2 id="gem-servers">Gem Servers</h2>
<ul>
<li><a href="https://github.com/gemfast/server">Gemfast</a> - A drop in
replacement for geminabox written in Go.</li>
<li><a href="https://github.com/geminabox/geminabox">Gem in a box</a> -
Really simple rubygem hosting.</li>
<li><a href="https://github.com/PierreRambaud/gemirro">Gemirro</a> - Gem
to automatically make a rubygems mirror.</li>
<li><a href="https://github.com/rubygems/gemstash">Gemstash</a> - A
RubyGems.org cache and private gem server.</li>
</ul>
<h2 id="geolocation">Geolocation</h2>
<ul>
<li><a href="https://github.com/alexreisner/geocoder">Geocoder</a> - A
complete geocoding solution for Ruby. With Rails it adds geocoding (by
street or IP address), reverse geocoding (find street address based on
given coordinates), and distance queries.</li>
<li><a href="https://github.com/cjheath/geoip">geoip</a> - Searches a
GeoIP database for a given host or IP address, and returns information
about the country where the IP address is allocated, and the city, ISP
and other information.</li>
<li><a href="https://github.com/geokit/geokit">Geokit</a> - Geokit gem
provides geocoding and distance/heading calculations.</li>
<li><a
href="https://github.com/apneadiving/Google-Maps-for-Rails">Google Maps
for Rails</a> - Enables easy Google map + overlays creation in Ruby
apps.</li>
<li><a href="https://github.com/rgeo/rgeo">rgeo</a> - Geospatial data
library. Spatial data types, geometric and spherical calculations, and
WKT/WKB serialization.</li>
</ul>
<h2 id="git-tools">Git Tools</h2>
<ul>
<li><a href="https://github.com/NARKOZ/ginatra">ginatra</a> - A web
frontend for Git repositories.</li>
<li><a
href="https://github.com/grosser/git-autobisect">git-auto-bisect</a> -
Find the commit that broke master.</li>
<li><a href="https://github.com/matt-harvey/git_curate">git_curate</a> -
Peruse and delete git branches ergonomically.</li>
<li><a href="https://github.com/reenhanced/gitreflow">git_reflow</a> -
An automated quality control workflow for Agile teams.</li>
<li><a href="https://github.com/osheroff/git-spelunk">git-spelunk</a> -
Dig through git blame history.</li>
<li><a href="https://github.com/grosser/git-whence">git-whence</a> -
Find which merge a commit came from.</li>
<li><a href="https://www.alchemists.io/projects/git-lint">Git Lint</a> -
Analyzes Git commits for consistent quality.</li>
<li><a href="https://github.com/brigade/overcommit">Overcommit</a> - A
fully configurable and extendable Git hook manager.</li>
<li><a href="https://github.com/libgit2/rugged">Rugged</a> - Ruby
bindings to libgit2.</li>
</ul>
<h2 id="graphql">GraphQL</h2>
<ul>
<li><a href="https://github.com/Shopify/graphql-batch">graphql-batch</a>
– A query batching executor.</li>
<li><a
href="https://github.com/github/graphql-client">graphql-client</a> - A
library for declaring, composing and executing GraphQL queries.</li>
<li><a
href="https://github.com/exAspArk/graphql-guard">graphql-guard</a> - A
simple field-level authorization.</li>
<li><a href="https://github.com/rmosolgo/graphql-ruby">graphql-ruby</a>
- Ruby implementation of GraphQL.</li>
</ul>
<h2 id="gui">GUI</h2>
<ul>
<li><a href="https://github.com/larskanis/fxruby">FXRuby</a> - A Ruby
library that provides an interface to the FOX GUI toolkit.</li>
<li><a href="https://github.com/AndyObtiva/glimmer">Glimmer</a> - Ruby
DSL for SWT</li>
<li><a href="https://github.com/ryanmelt/qtbindings">qtbindings</a> -
Allows the QT Gui toolkit to be used from Ruby.</li>
<li><a href="https://github.com/ruby-gnome/ruby-gnome">Ruby-GNOME</a> -
Ruby language bindings for the GNOME development environment.</li>
<li><a href="http://shoesrb.com">Shoes</a> - Shoes makes building little
graphical programs for Mac, Windows, and Linux super simple.</li>
</ul>
<h2 id="htmlxml-parsing">HTML/XML Parsing</h2>
<ul>
<li><a href="https://github.com/dam5s/happymapper">HappyMapper</a> -
Object to XML mapping library, using Nokogiri.</li>
<li><a href="https://github.com/jch/html-pipeline">HTML::Pipeline</a> -
HTML processing filters and utilities.</li>
<li><a href="https://nokogiri.org">Nokogiri</a> - An HTML, XML, SAX, and
Reader parser with XPath and CSS selector support.</li>
<li><a href="https://github.com/serpapi/nokolexbor">Nokolexbor</a> -
High-performance HTML5 parser based on Lexbor, with support for both CSS
selectors and XPath.</li>
<li><a href="https://gitlab.com/yorickpeterse/oga">Oga</a> - An XML/HTML
parser written in Ruby. Oga does not require system libraries such as
libxml, making it easier and faster to install on various
platforms.</li>
<li><a href="https://github.com/ohler55/ox">Ox</a> - A fast XML parser
and Object marshaller.</li>
<li><a href="https://github.com/Empact/roxml">ROXML</a> - Custom mapping
and bidirectional marshalling between Ruby and XML using
annotation-style class methods, via Nokogiri or LibXML.</li>
</ul>
<h2 id="http-clients-and-tools">HTTP Clients and tools</h2>
<ul>
<li><a href="https://github.com/cyril/accept_language.rb">Accept
Language</a> - A tiny library for parsing the
<code>Accept-Language</code> header from browsers (as defined in <a
href="https://datatracker.ietf.org/doc/html/rfc2616#section-14.4">RFC
2616</a>).</li>
<li><a href="https://github.com/excon/excon">excon</a> - Usable, fast,
simple Ruby HTTP 1.1. It works great as a general HTTP(s) client and is
particularly well suited to usage in API clients.</li>
<li><a href="https://github.com/lostisland/faraday">Faraday</a> - an
HTTP client lib that provides a common interface over many adapters
(such as Net::HTTP) and embraces the concept of Rack middleware when
processing the request/response cycle.</li>
<li><a href="https://github.com/podigee/device_detector">Device
Detector</a> - A precise and fast user agent parser and device detector,
backed by the largest and most up-to-date user agent database.</li>
<li><a href="https://github.com/nahi/httpclient">Http Client</a> - Gives
something like the functionality of libwww-perl (LWP) in Ruby.</li>
<li><a href="https://github.com/httprb/http">HTTP</a> - The HTTP Gem: a
simple Ruby DSL for making HTTP requests.</li>
<li><a href="https://gitlab.com/honeyryderchuck/httpx">HTTPX</a> - Pure
ruby HTTP client, supports HTTP/2 and HTTP/1, concurrent requests,
plugin system for extended features (cookies, retries, following
redirects, proxy, streaming…).</li>
<li><a href="https://github.com/jnunemaker/httparty">httparty</a> -
Makes http fun again!</li>
<li><a href="https://github.com/igrigorik/http-2">Http-2</a> - Pure Ruby
implementation of HTTP/2 protocol</li>
<li><a href="https://github.com/toland/patron">Patron</a> - Patron is a
Ruby HTTP client library based on libcurl.</li>
<li><a href="https://github.com/rest-client/rest-client">RESTClient</a>
- Simple HTTP and REST client for Ruby, inspired by microframework
syntax for specifying actions.</li>
<li><a href="https://github.com/savonrb/savon">Savon</a> - Savon is a
SOAP client for the Ruby programming language.</li>
<li><a href="https://github.com/lostisland/sawyer">Sawyer</a> - Secret
user agent of HTTP, built on top of Faraday.</li>
<li><a href="https://github.com/aderyabin/sniffer">Sniffer</a> – Tool to
log and debug outgoing HTTP requests across multiple ruby
libraries.</li>
<li><a href="https://github.com/typhoeus/typhoeus">Typhoeus</a> -
Typhoeus wraps libcurl in order to make fast and reliable requests.</li>
</ul>
<h2 id="image-processing">Image Processing</h2>
<ul>
<li><a href="https://github.com/sdsykes/fastimage">FastImage</a> -
FastImage finds the size or type of an image given its uri by fetching
as little as needed.</li>
<li><a
href="https://github.com/janko/image_processing">ImageProcessing</a> -
High-level image processing wrapper for libvips and
ImageMagick/GraphicsMagick</li>
<li><a href="https://github.com/minimagick/minimagick">MiniMagick</a> -
A ruby wrapper for ImageMagick or GraphicsMagick command line.</li>
<li><a href="https://github.com/westonplatter/phashion">Phasion</a> -
Ruby wrapper around pHash, the perceptual hash library for detecting
duplicate multimedia files.</li>
<li><a href="https://github.com/layervault/psd.rb">PSD.rb</a> - Parse
Photoshop files in Ruby with ease.</li>
<li><a href="https://github.com/rmagick/rmagick">RMagick</a> - RMagick
is an interface between Ruby and ImageMagick.</li>
<li><a href="https://github.com/jcupitt/ruby-vips">ruby-vips</a> - A
binding for the libvips image processing library.</li>
<li><a href="https://github.com/maxim/skeptick">Skeptick</a> - Skeptick
is an all-purpose DSL for building and running ImageMagick
commands.</li>
</ul>
<h2 id="implementationscompilers">Implementations/Compilers</h2>
<ul>
<li><a href="https://github.com/jruby/jruby">JRuby</a> - A Java
implementation of the Ruby language.</li>
<li><a href="https://github.com/mruby/mruby">MRuby</a> - Lightweight
Ruby. Can be linked and embedded in your application.</li>
<li><a href="https://github.com/natalie-lang/natalie">Natalie</a> -
Natalie is a Ruby compiler that provides an ahead-of-time compiler using
C++ and gcc/clang as the backend.</li>
<li><a href="https://github.com/opal/opal">Opal</a> - Ruby to Javascript
compiler.</li>
<li><a href="https://github.com/rubinius/rubinius">Rubinius</a> - An
implementation of the Ruby programming language. Rubinius includes a
bytecode virtual machine, Ruby syntax parser, bytecode compiler,
generational garbage collector, just-in-time (JIT) native machine code
compiler, and Ruby Core and Standard libraries.</li>
<li><a href="https://github.com/oracle/truffleruby">TruffleRuby</a> - A
high performance implementation of the Ruby programming language. Built
on the GraalVM by Oracle Labs.</li>
</ul>
<h2 id="internationalization">Internationalization</h2>
<ul>
<li><a href="https://github.com/grosser/fast_gettext">FastGettext</a> -
Ruby internationalization tool with less memory, simple, clean namespace
and threadsafe.</li>
<li><a href="https://github.com/globalize/globalize">Globalize</a> -
Globalize builds on the I18n API in Ruby on Rails to add model
translations to ActiveRecord models.</li>
<li><a href="https://github.com/glebm/i18n-tasks">i18n-tasks</a> -
Manage missing and unused translations with the awesome power of static
analysis.</li>
<li><a href="https://github.com/svenfuchs/i18n">i18n</a> - Ruby
Internationalization and localization solution.</li>
<li><a href="https://github.com/markets/mini_i18n">mini_i18n</a> -
Minimalistic, flexible and fast Internationalization library. It
supports localization, interpolations, pluralization, fallbacks, nested
keys and more.</li>
<li><a href="https://github.com/svenfuchs/rails-i18n">rails-i18n</a> -
Repository for collecting Locale data for Rails I18n as well as other
interesting, Rails related I18n stuff.</li>
<li><a href="https://github.com/ai/r18n">r18n</a> - Advanced i18n
library for Rails, Sinatra, desktop apps, models, works well with
complex languages like Russian.</li>
<li><a href="https://github.com/pawurb/termit">Termit</a> - Translations
with speech synthesis in your terminal.</li>
<li><a href="https://github.com/tolk/tolk">Tolk</a> - A web interface
for doing i18n translations packaged as a Rails engine.</li>
<li><a
href="https://github.com/twitter/twitter-cldr-rb">twitter-cldr-rb</a> -
Ruby implementation of the ICU (International Components for Unicode)
that uses the Common Locale Data Repository to format dates, plurals,
and more.</li>
</ul>
<h2 id="irb">IRB</h2>
<ul>
<li><a href="https://github.com/janlelis/clipboard">Clipboard</a> -
Access to the system clipboard on Linux, MacOS and Windows.</li>
<li><a href="https://github.com/tompng/katakata_irb">KatakataIrb</a> -
IRB with Kata(型 Type) completion.</li>
<li><a href="https://github.com/janlelis/irbtools">irbtools</a> -
Improvements for Ruby’s IRB.</li>
<li><a href="https://github.com/oggy/looksee">Looksee</a> - A tool for
illustrating the ancestry and method lookup path of objects. Handy for
exploring unfamiliar codebases.</li>
<li><a href="https://github.com/pry/pry">Pry</a> - A powerful
alternative to the standard IRB shell for Ruby.</li>
<li><a href="http://rib.godfat.org">rib</a> - A lightweight and
extensible IRB replacement.</li>
</ul>
<h2 id="logging">Logging</h2>
<ul>
<li><a href="https://github.com/fluent/fluentd">Fluentd</a> - Fluentd
collects events from various data sources and writes them to files,
database or other types of storages.</li>
<li><a href="https://github.com/trusche/httplog">HttpLog</a> - Log
outgoing HTTP requests.</li>
<li><a href="https://github.com/colbygk/log4r">Log4r</a> - Log4r is a
comprehensive and flexible logging library for use in Ruby
programs.</li>
<li><a href="https://github.com/TwP/logging">Logging</a> - A flexible
logging library for use in Ruby programs based on the design of Java’s
log4j library.</li>
<li><a href="https://github.com/roidrage/lograge">Lograge</a> - An
attempt to tame Rails’ default policy to log everything.</li>
<li><a href="https://github.com/tilfin/ougai">Ougai</a> - A structured
logging system that is capable of handling a message, structured data,
or an exception easily. It has JSON and human-readable formatters.</li>
<li><a href="https://github.com/asenchi/scrolls">Scrolls</a> - Simple
logging.</li>
<li><a href="https://logger.rocketjob.io/">Semantic Logger</a> -
Scalable, next generation enterprise logging for Ruby.</li>
<li><a href="https://github.com/crohr/syslogger">Syslogger</a> - A
drop-in replacement for the standard Logger Ruby library, that logs to
the syslog instead of a log file.</li>
<li><a href="https://github.com/rudionrails/yell">Yell</a> - Your
Extensible Logging Library.</li>
</ul>
<h2 id="machine-learning">Machine Learning</h2>
<ul>
<li><a href="https://github.com/sergiofierens/ai4r">AI4R</a> -
Algorithms covering several Artificial intelligence fields.</li>
<li><a
href="https://github.com/arbox/machine-learning-with-ruby">Awesome
Machine Learning with Ruby</a> - A Curated List of Ruby Machine Learning
Links and Resources.</li>
<li><a
href="https://github.com/patterns-ai-core/langchainrb">langchain.rb</a>
- Library for building LLM-powered applications in Ruby.</li>
<li><a href="https://github.com/BayesWitnesses/m2cgen">m2cgen</a> - A
CLI tool to transpile trained classic ML models into a native Ruby code
with zero dependencies.</li>
<li><a
href="https://github.com/PredictionIO/PredictionIO-Ruby-SDK">PredictionIO
Ruby SDK</a> - The PredictionIO Ruby SDK provides a convenient API to
quickly record your users’ behavior and retrieve personalized
predictions for them.</li>
<li><a href="https://github.com/febeling/rb-libsvm">rb-libsvm</a> - Ruby
language bindings for LIBSVM. SVM is a machine learning and
classification algorithm.</li>
<li><a href="https://github.com/tangledpath/ruby-fann">ruby-fann</a> -
Ruby library for interfacing with FANN (Fast Artificial Neural
Network).</li>
<li><a href="https://github.com/alexrudall/ruby-openai">ruby-openai</a>
- OpenAI API + Ruby!</li>
<li><a href="https://github.com/yoshoku/rumale">rumale</a> - A machine
learning library with interfaces similar to Scikit-Learn.</li>
<li><a href="https://github.com/ankane/tensorflow">TensorFlow</a> - The
end-to-end machine learning platform for Ruby.</li>
<li><a href="https://github.com/ankane/torch.rb">Torch.rb</a> - Deep
learning for Ruby, powered by LibTorch.</li>
<li><a href="https://github.com/paulgoetze/weka-jruby">weka</a> -
Machine learning and data mining algorithms for JRuby.</li>
</ul>
<h2 id="markdown-processors">Markdown Processors</h2>
<ul>
<li><a href="https://github.com/gettalong/kramdown">kramdown</a> -
Kramdown is yet-another-markdown-parser but fast, pure Ruby, using a
strict syntax definition and supporting several common extensions.</li>
<li><a
href="https://github.com/BurdetteLamar/markdown_helper#markdown-helper">markdown_helper</a>
- A markdown pre-processor implementing file inclusion and page TOC
(table of contents).</li>
<li><a href="https://github.com/bhollis/maruku">Maruku</a> - A pure-Ruby
Markdown-superset interpreter.</li>
<li><a href="https://github.com/vmg/redcarpet">Redcarpet</a> - A fast,
safe and extensible Markdown to (X)HTML parser.</li>
<li><a
href="https://github.com/benbalter/word-to-markdown">word-to-markdown</a>
- Gem to convert Microsoft Word documents to Markdown.</li>
<li><a
href="https://github.com/ZhgChgLi/ZMediumToMarkdown">ZMediumToMarkdown</a>
- A powerful tool that allows you to effortlessly download and convert
your Medium posts to Markdown format.</li>
</ul>
<h2 id="measurements">Measurements</h2>
<ul>
<li><a href="https://github.com/Shopify/measured">Measured</a> - Wrapper
objects which encapsulate measurements and their associated units in
Ruby.</li>
<li><a href="https://github.com/olbrich/ruby-units">Ruby Units</a> -
Provides classes and methods to perform unit math and conversions.</li>
</ul>
<h2 id="mobile-development">Mobile Development</h2>
<ul>
<li><a href="https://github.com/cesarferreira/dryrun">dryrun</a> - Try
any Android library on your smartphone directly from the command
line.</li>
<li><a href="https://github.com/fastlane/fastlane">fastlane</a> -
Connect all iOS deployment tools into one streamlined workflow.</li>
<li><a href="https://github.com/pubnub/ruby">PubNub</a> - Real-time Push
Service in the Cloud.</li>
<li><a href="https://github.com/ruboto/ruboto">Ruboto</a> - A platform
for developing full stand-alone apps for Android using the Ruby language
and libraries.</li>
<li><a href="http://www.rubymotion.com">RubyMotion</a> - A revolutionary
toolchain that lets you quickly develop and test full-fledged native iOS
and OS X applications for iPhone, iPad, Mac and Android.</li>
</ul>
<h2 id="money">Money</h2>
<ul>
<li><a
href="https://github.com/RubyMoney/eu_central_bank">eu_central_bank</a>
- A gem that calculates the exchange rate using published rates from
European Central Bank.</li>
<li><a href="https://github.com/RubyMoney/monetize">Monetize</a> - A
library for converting various objects into Money objects.</li>
<li><a href="https://github.com/RubyMoney/money">Money</a> - A Ruby
Library for dealing with money and currency conversion.</li>
</ul>
<h2 id="music-and-sound">Music and Sound</h2>
<ul>
<li><a href="https://github.com/pedrozath/coltrane">Coltrane</a> - A
music theory library with a command-line interface.</li>
<li><a href="https://github.com/smashingboxes/maestro">Maestro</a> - A
Slack-Powered music bot for Spotify</li>
<li><a href="https://github.com/samaaron/sonic-pi">Sonic Pi</a> - A live
coding synth for everyone originally designed to support computing and
music lessons.</li>
</ul>
<h2 id="natural-language-processing">Natural Language Processing</h2>
<ul>
<li><a href="https://github.com/arbox/nlp-with-ruby">Awesome NLP with
Ruby</a> - Awesome List for Practical Natural Language Processing done
in Ruby.</li>
<li><a href="http://kschiess.github.io/parslet/">Parslet</a> - A small
Ruby library for constructing parsers in the PEG (Parsing Expression
Grammar) fashion.</li>
<li><a
href="https://github.com/watsonbox/pocketsphinx-ruby">pocketsphinx-ruby</a>
- Ruby speech recognition with Pocketsphinx.</li>
<li><a href="https://github.com/diasks2/pragmatic_segmenter">Pragmatic
Segmenter</a> - Pragmatic Segmenter is a rule-based sentence boundary
detection gem that works out-of-the-box across many languages.</li>
<li><a href="https://github.com/diasks2/ruby-nlp">Ruby Natural Language
Processing Resources</a> - Collection of links to Ruby Natural Language
Processing (NLP) libraries, tools and software.</li>
<li><a
href="https://github.com/omohokcoj/ruby-spellchecker">ruby-spellchecker</a>
- English spelling and grammar checker that can be used for
autocorrection.</li>
<li><a href="https://github.com/7compass/sentimental">Sentimental</a> -
Simple sentiment analysis with Ruby.</li>
<li><a href="https://github.com/threedaymonk/text">Text</a> - A
collection of text algorithms including Levenshtein distance, Metaphone,
Soundex 2, Porter stemming &amp; White similarity.</li>
<li><a href="https://github.com/louismullie/treat">Treat</a> - Treat is
a toolkit for natural language processing and computational linguistics
in Ruby.</li>
<li><a href="https://github.com/cjheath/treetop">Treetop</a> - PEG
(Parsing Expression Grammar) parser.</li>
<li><a href="https://github.com/abitdodgy/words_counted">Words
Counted</a> - A highly customisable Ruby text analyser and word
counter.</li>
</ul>
<h2 id="networking">Networking</h2>
<ul>
<li><a href="https://github.com/alexdalitz/dnsruby">Dnsruby</a> - A pure
Ruby DNS client library which implements a stub resolver. It aims to
comply with all DNS RFCs.</li>
<li><a href="https://github.com/ioquatix/rubydns">RubyDNS</a> - A
high-performance DNS server which can be easily integrated into other
projects or used as a stand-alone daemon.</li>
<li><a href="https://github.com/packetfu/packetfu">PacketFu</a> - A
library for reading and writing packets to an interface or to a
libpcap-formatted file.</li>
</ul>
<h2 id="notifications">Notifications</h2>
<ul>
<li><a href="https://github.com/excid3/noticed">Noticed</a> -
ActionMailer-like Notification System for your Ruby on Rails app.</li>
<li><a href="https://github.com/calonso/ruby-push-notifications">Ruby
Push Notifications</a> - iOS, Android and Windows Phone Push
notifications made easy.</li>
<li><a href="https://github.com/rpush/rpush">Rpush</a> - The push
notification service for Ruby which supports Apple Push Notification
Service, Google Cloud Messaging, Amazon Device Messaging and Windows
Phone Push Notification Service.</li>
<li><a href="https://github.com/zaru/webpush">webpush</a> - Encryption
Utilities for Web Push protocol.</li>
</ul>
<h2 id="optimizations">Optimizations</h2>
<ul>
<li><a href="https://github.com/Shopify/bootsnap">bootsnap</a> - Boot
large Ruby/Rails apps faster.</li>
<li><a href="https://github.com/SamSaffron/fast_blank">fast_blank</a> -
Provides a C-optimized method for determining if a string is blank.</li>
<li><a href="https://github.com/fatkodima/fast_count">fast_count</a> -
Quickly get a count estimation for large tables (&gt;99% of accuracy for
PostgreSQL).</li>
<li><a
href="https://github.com/kddeisz/fast_underscore">fast_underscore</a> -
Provides a C-optimized method for transforming a string from any
capitalization into underscore-separated</li>
<li><a
href="https://github.com/fatkodima/pluck_in_batches">pluck_in_batches</a>
- A faster alternative to the custom use of <code>in_batches</code> with
<code>pluck</code>.</li>
<li><a href="https://github.com/brianmario/yajl-ruby">yajl-ruby</a> - A
streaming JSON parsing and encoding library for Ruby (C bindings to
yajl).</li>
</ul>
<h2 id="ormodm">ORM/ODM</h2>
<ul>
<li><a
href="https://github.com/rails/rails/tree/master/activerecord">ActiveRecord</a>
- Object-relational mapping in Rails.</li>
<li><a href="https://github.com/hanami/model">Hanami::Model</a> - A lean
Repository-pattern based ORM framework for Hanami and modern Ruby
applications.</li>
<li><a href="https://github.com/mongodb/mongoid">Mongoid</a> - An ODM
(Object-Document-Mapper) framework for MongoDB in Ruby.</li>
<li><a href="https://github.com/spohlenz/mongomodel">MongoModel</a> -
Ruby ODM for interfacing with MongoDB databases.</li>
<li><a href="http://neo4jrb.io">Neo4j.rb</a> - A Neo4j OGM
(Object-Graph-Mapper) for use in Ruby on Rails and Rack frameworks
heavily inspired by ActiveRecord.</li>
<li><a href="https://github.com/nviennot/nobrainer/">NoBrainer</a> - A
RethinkDB ORM for Ruby</li>
<li><a href="https://github.com/soveran/ohm">Ohm</a> - Object-hash
mapping library for Redis.</li>
<li><a
href="https://github.com/nateware/redis-objects">Redis-Objects</a> -
Redis Objects provides a Rubyish interface to Redis, by mapping Redis
data types to Ruby objects, via a thin layer over the redis gem.</li>
<li><a href="https://github.com/rom-rb/rom">ROM</a> - Ruby Object Mapper
(ROM) is an experimental Ruby library with the goal to provide powerful
object mapping capabilities without limiting the full power of your
datastore.</li>
<li><a href="https://github.com/jeremyevans/sequel">Sequel</a> - Sequel
is a simple, flexible, and powerful SQL database access toolkit for
Ruby.</li>
</ul>
<h2 id="ormodm-extensions">ORM/ODM Extensions</h2>
<ul>
<li>Auditing and Versioning
<ul>
<li><a
href="https://github.com/westonganger/active_snapshot">active_snapshot</a>
- Simplified snapshots and restoration for ActiveRecord models and
associations with a transparent white-box implementation</li>
<li><a
href="https://github.com/expectedbehavior/acts_as_archival">acts_as_archival</a>
- ActiveRecord plugin for atomic object tree archiving.</li>
<li><a
href="https://github.com/ActsAsParanoid/acts_as_paranoid">ActsAsParanoid</a>
- ActiveRecord plugin allowing you to hide and restore records without
actually deleting them.</li>
<li><a href="https://github.com/collectiveidea/audited">Audited</a> -
Audited is an ORM extension for ActiveRecord &amp; MongoMapper that logs
all changes to your models.</li>
<li><a href="https://github.com/dockyard/ruby-destroyed_at">Destroyed
At</a> - Allows you to “destroy” an object without deleting the record
or associated records.</li>
<li><a href="https://github.com/jhawthorn/discard">Discard</a> - A
simple ActiveRecord mixin to add conventions for flagging records as
discarded.</li>
<li><a href="https://github.com/palkan/logidze">Logidze</a> - Database
changes log for Rails.</li>
<li><a href="https://github.com/basecamp/marginalia">marginalia</a> -
Attach comments to your ActiveRecord queries. By default, it adds the
application, controller, and action names as a comment at the end of
each query.</li>
<li><a
href="https://github.com/aq1018/mongoid-history">mongoid-history</a> -
Multi-user non-linear history tracking, auditing, undo, redo for
mongoid.</li>
<li><a href="https://github.com/airblade/paper_trail">PaperTrail</a> -
Track changes to your ActiveRecord models’ data for auditing or
versioning.</li>
<li><a href="https://github.com/radar/paranoia">Paranoia</a> - A
re-implementation of acts_as_paranoid for Rails 3 and 4, using much,
much, much less code.</li>
<li><a
href="https://github.com/JackDanger/permanent_records">PermenantRecords</a>
- Soft-delete your ActiveRecord records, like an explicit version of
ActsAsParanoid.</li>
</ul></li>
<li>Bit array
<ul>
<li><a href="https://github.com/kenn/active_flag">ActiveFlag</a> - Store
up to 64 multiple flags in a single integer column with
ActiveRecord.</li>
<li><a href="https://github.com/grosser/bitfields">Bitfields</a> - Save
migrations and columns by storing multiple booleans in a single
integer.</li>
</ul></li>
<li>Import
<ul>
<li><a
href="https://github.com/zdennis/activerecord-import">ActiveRecord
Import</a> - a library for bulk inserting data using ActiveRecord.</li>
<li><a href="https://github.com/jamis/bulk_insert">bulk_insert</a> - A
little ActiveRecord extension for helping to insert lots of rows in a
single insert statement.</li>
<li><a href="https://github.com/seamusabshere/data_miner">data_miner</a>
- Download, pull out of a ZIP/TAR/GZ/BZ2 archive, parse, correct, and
import XLS, ODS, XML, CSV, HTML, etc. into your ActiveRecord
models.</li>
<li><a href="https://github.com/cmu-is-projects/ferry">ferry</a> - A
ruby gem for easy data transfer.</li>
</ul></li>
<li>Misc
<ul>
<li><a
href="https://github.com/faveod/arel-extensions">arel_extensions</a> -
Extending Arel: more “rubyish” syntax, functions for strings, dates,
math… and add native extensions for some DBs.</li>
<li><a
href="https://github.com/drecom/activerecord-turntable">ActiveRecord::Turntable</a>
- A database sharding extension for ActiveRecord.</li>
<li><a
href="https://github.com/franckverrot/activevalidators">ActiveValidators</a>
- An exhaustive collection of off-the-shelf and tested
ActiveModel/ActiveRecord validations.</li>
<li><a href="https://github.com/khiav223577/deep_pluck">DeepPluck</a> -
Allow you to pluck attributes from nested associations without loading a
bunch of records.</li>
<li><a href="https://github.com/brainspec/enumerize">Enumerize</a> -
Enumerated attributes with I18n and ActiveRecord/Mongoid/MongoMapper
support.</li>
<li><a href="https://github.com/salsify/goldiloader">Goldiloader</a> -
Automatic ActiveRecord eager loading.</li>
<li><a href="https://github.com/wbotelhos/rating">Rating</a> - A true
Bayesian rating system with scope and cache enabled.</li>
</ul></li>
<li>Multi-tenancy
<ul>
<li><a href="https://github.com/ErwinM/acts_as_tenant">Acts As
Tennant</a> - Add multi-tenancy to a Rails app through a shared database
strategy.</li>
<li><a href="https://github.com/influitive/apartment">Apartment</a> -
Multi-tenancy for Rails and ActiveRecord.</li>
<li><a href="https://github.com/jekuno/milia">Milia</a> - Non-invasive
multi-tenancy for Rails which supports Devise authentication out of the
box.</li>
</ul></li>
<li>Social
<ul>
<li><a href="https://github.com/merit-gem/merit">Merit</a> - Adds
reputation behavior to Rails apps in the form of Badges, Points, and
Rankings for ActiveRecord or Mongoid.</li>
<li><a
href="https://github.com/chaps-io/public_activity">PublicActivity</a> -
Provides easy activity tracking for your ActiveRecord, Mongoid 3 and
MongoMapper models in Rails 3 and 4. Similar to Github’s Public
Activity.</li>
<li><a href="https://github.com/kigster/simple-feed">Simple Feed</a> -
Fast and highly scalable read-optimized social activity feed library in
pure Ruby, backed by Redis.</li>
<li><a href="https://github.com/ledermann/unread">Unread</a> - Manage
read/unread status of ActiveRecord objects - and it’s fast.</li>
</ul></li>
<li>Sorting
<ul>
<li><a href="https://github.com/swanandp/acts_as_list">ActsAsList</a> -
Provides the capabilities for sorting and reordering a number of objects
in a list.</li>
<li><a href="https://github.com/brendon/positioning">positioning</a> -
Simple positioning for Active Record models. Supports multiple lists per
model and relative positioning.</li>
<li><a href="https://github.com/mixonic/ranked-model">ranked-model</a> -
A modern row sorting library for ActiveRecord. It uses ARel aggressively
and is better optimized than most other libraries.</li>
</ul></li>
<li>Tree
<ul>
<li><a href="https://github.com/amerine/acts_as_tree">ActsAsTree</a> -
Extends ActiveRecord to add simple support for organizing items into
parent–children relationships.</li>
<li><a
href="https://github.com/1and1/acts_as_recursive_tree">ActsAsRecursiveTree</a>
- ActsAsTree but recursive.</li>
<li><a href="https://github.com/stefankroes/ancestry">Ancestry</a> -
Organise ActiveRecord model into a tree structure using a variation on
the materialised path pattern.</li>
<li><a
href="https://github.com/collectiveidea/awesome_nested_set">Awesome
Nested Set</a> - Awesome Nested Set is an implementation of the nested
set pattern for ActiveRecord models.</li>
<li><a href="https://github.com/mceachen/closure_tree">Closure Tree</a>
- Easily and efficiently make your ActiveRecord models support
hierarchies using a Closure Table.</li>
<li><a href="https://github.com/benedikt/mongoid-tree">Mongoid Tree</a>
- A tree structure for Mongoid documents using the materialized path
pattern.</li>
</ul></li>
</ul>
<h2 id="package-management">Package Management</h2>
<ul>
<li>Gems
<ul>
<li><a href="https://bundler.io">Bundler</a> - Manage your application’s
gem dependencies with less pain.</li>
<li><a href="https://rubygems.org">RubyGems</a> - Community’s gem
hosting service.</li>
<li><a href="https://cloudsmith.io">Cloudsmith</a> - A fully managed
package management SaaS with support for Rubygems (and many
others).</li>
</ul></li>
<li>Packages and Applications
<ul>
<li><a href="https://github.com/berkshelf/berkshelf">Berkshelf</a> - A
Chef Cookbook manager.</li>
<li><a href="https://github.com/CocoaPods/CocoaPods">CocoaPods</a> - The
Objective-C dependency manager.</li>
<li><a href="https://github.com/jordansissel/fpm">fpm</a> - Effing
package management! Build packages for multiple platforms (deb, rpm,
etc) with great ease and sanity.</li>
<li><a href="https://github.com/Homebrew/linuxbrew-core">Linuxbrew</a> -
A fork of Homebrew for Linux.</li>
<li><a
href="https://github.com/caskroom/homebrew-cask">Homebrew-cask</a> - A
CLI workflow for the administration of Mac applications distributed as
binaries.</li>
<li><a href="https://github.com/Homebrew/brew">Homebrew</a> - The
missing package manager for OS X.</li>
<li><a href="https://foobarwidget.github.io/traveling-ruby/">Traveling
Ruby</a> - Traveling Ruby lets you create self-contained Ruby app
packages for Linux and OS X.</li>
</ul></li>
</ul>
<h2 id="pagination">Pagination</h2>
<ul>
<li><a
href="https://github.com/healthie/activerecord_cursor_paginate">activerecord_cursor_paginate</a>
- Cursor-based pagination for ActiveRecord.</li>
<li><a href="https://github.com/amatsuda/kaminari">Kaminari</a> - A
Scope &amp; Engine based, clean, powerful, customizable and
sophisticated paginator for modern web app frameworks and ORMs.</li>
<li><a href="https://github.com/glebm/order_query">order_query</a> - A
keyset pagination library to find the next or previous record(s)
relative to the current one efficiently, e.g. for infinite scroll.</li>
<li><a href="https://github.com/ddnexus/pagy">Pagy</a> - Pagy is the
ultimate pagination gem that outperforms the others in each and every
benchmark and comparison. More details can be found on <a
href="https://ddnexus.github.io/pagy/index">Pagy Wiki</a>.</li>
<li><a href="https://github.com/mislav/will_paginate">will_paginate</a>
- A pagination library that integrates with Ruby on Rails, Sinatra,
Merb, DataMapper and Sequel.</li>
</ul>
<h2 id="pdf">PDF</h2>
<ul>
<li><a href="https://github.com/boazsegev/combine_pdf">CombinePDF</a> -
A Pure ruby library to merge or stump PDF files, number pages and
more.</li>
<li><a href="https://github.com/jonmagic/grim">Grim</a> - Extract PDF
pages as images and text. A simple Ruby API to ghostscript, imagemagick,
and pdftotext.</li>
<li><a href="https://github.com/gettalong/hexapdf">HexaPDF</a> - A
Versatile PDF Creation and Manipulation Library For Ruby.</li>
<li><a
href="https://github.com/strzibny/invoice_printer">InvoicePrinter</a> -
Super simple PDF invoicing in Ruby (built on top of Prawn).</li>
<li><a href="https://github.com/fnando/kitabu">Kitabu</a> - A framework
for creating e-books from Markdown/Textile text markup using Ruby.</li>
<li><a href="https://github.com/pdfkit/pdfkit">Pdfkit</a> - HTML+CSS to
PDF using wkhtmltopdf.</li>
<li><a href="https://github.com/prawnpdf/prawn">Prawn</a> - Fast, Nimble
PDF Writer for Ruby.</li>
<li><a href="https://github.com/shairontoledo/rghost">RGhost</a> -
RGhost is a document creation and conversion API.</li>
<li><a href="https://github.com/fullscreen/squid">Squid</a> - Squid · A
Ruby library to plot charts in PDF files</li>
<li><a href="https://github.com/mileszs/wicked_pdf">Wicked Pdf</a> - PDF
generator (from HTML) plugin for Ruby on Rails.</li>
</ul>
<h2 id="performance-monitoring">Performance Monitoring</h2>
<ul>
<li><a
href="https://github.com/expectedbehavior/instrumental_agent">Instrumental</a>
- Measure your application in real time with <a
href="http://instrumentalapp.com">Instrumental</a>.</li>
<li><a href="https://github.com/newrelic/rpm">New Relic</a> - Find and
fix Ruby errors with New Relic application monitoring and
troubleshooting.</li>
<li><a href="https://github.com/BaseSecrete/rorvswild">RoRvsWild</a> -
Performances and exceptions monitoring for Rails developers.</li>
<li><a href="https://github.com/scoutapp/scout_apm_ruby">Scout</a> -
Scout Ruby Application Monitoring Agent.</li>
<li><a href="https://github.com/skylightio/skylight-ruby">Skylight</a> -
A smart profiler for your Rails apps that visualizes request
performance.</li>
</ul>
<h2 id="presentation-programs">Presentation Programs</h2>
<ul>
<li><a href="https://github.com/slideshow-s9/slideshow">Slide Show
(S9)</a> - Write your slides / talks / presentations in plain text with
markdown formatting conventions and generate (static) web pages;
template packs incl. deck.js, impress.js, reveal.js, shower, s6, s5 and
more.</li>
</ul>
<h2 id="process-management-and-monitoring">Process Management and
Monitoring</h2>
<ul>
<li><a href="https://github.com/bluepill-rb/bluepill">Bluepill</a> -
Simple process monitoring tool.</li>
<li><a href="https://github.com/kostya/eye">Eye</a> - Process monitoring
tool. Inspired from Bluepill and God.</li>
<li><a href="https://github.com/ddollar/foreman">Foreman</a> - Manage
Procfile-based applications.</li>
<li><a href="https://github.com/mojombo/god">God</a> - An easy to
configure, easy to extend monitoring framework written in Ruby.</li>
<li><a href="https://github.com/lbeder/health-monitor-rails">Health
Monitor Rails</a> - A mountable Rails plug-in to check health of
services (Database, Cache, Sidekiq, Redis, e.t.c.) used by the Rails
app.</li>
<li><a href="https://github.com/adamcooke/procodile">Procodile</a> - Run
processes in the background (and foreground) on Mac &amp; Linux from a
Procfile.</li>
<li><a
href="https://github.com/OpenGems/redis_web_manager">RedisWebManager</a>
- Web interface that allows you to manage easily your Redis instance
(see keys, memory used, connected client, etc…).</li>
</ul>
<h2 id="processes">Processes</h2>
<ul>
<li><a href="https://github.com/jarib/childprocess">childprocess</a> -
Cross-platform ruby library for managing child processes.</li>
<li><a href="https://github.com/rtomayko/posix-spawn">posix-spawn</a> -
Fast Process::spawn for Rubys &gt;= 1.8.7 based on the posix_spawn()
system interfaces.</li>
</ul>
<h2 id="profiler-and-optimization">Profiler and Optimization</h2>
<ul>
<li><a href="https://github.com/exaspark/batch-loader">batch-loader</a>
– A generic lazy batching mechanism to avoid N+1 DB queries, HTTP
queries, etc.</li>
<li><a href="https://github.com/evanphx/benchmark-ips">benchmark-ips</a>
- Provides iteration per second benchmarking for Ruby.</li>
<li><a href="https://github.com/flyerhzm/bullet">bullet</a> - Help to
kill N+1 queries and unused eager loading.</li>
<li><a href="https://github.com/schneems/derailed_benchmarks">Derailed
Benchmarks</a> - A series of things you can use to benchmark any Rack
based app.</li>
<li><a href="https://github.com/peek/peek">Peek</a> - Visual status bar
showing Rails performance.</li>
<li><a
href="https://github.com/MiniProfiler/rack-mini-profiler">rack-mini-profiler</a>
- Profiler for your development and production Ruby rack apps.</li>
<li><a href="https://github.com/code-mancers/rbkit">Rbkit</a> - profiler
for Ruby. With a GUI.</li>
<li><a href="https://github.com/rbspy/rbspy">rbspy</a> - Sampling
profiler for any Ruby process.</li>
<li><a href="https://github.com/ruby-prof/ruby-prof">ruby-prof</a> - A
code profiler for MRI rubies.</li>
<li><a href="https://github.com/tmm1/stackprof">stackprof</a> - A
sampling call-stack profiler for ruby 2.1+.</li>
<li><a href="https://github.com/palkan/test-prof">test-prof</a> - Ruby
Tests Profiling Toolbox</li>
</ul>
<h2 id="qr">QR</h2>
<ul>
<li><a href="https://github.com/whomwah/rqrcode">RQRCode</a> - RQRCode
is a library for creating and rendering QR codes into various
formats.</li>
</ul>
<h2 id="queues-and-messaging">Queues and Messaging</h2>
<ul>
<li><a href="https://github.com/nesquena/backburner">Backburner</a> -
Backburner is a beanstalkd-powered job queue that can handle a very high
volume of jobs.</li>
<li><a href="https://github.com/ruby-amqp/bunny">Bunny</a> - Bunny is a
popular, easy to use, well-maintained Ruby client for RabbitMQ
(3.3+).</li>
<li><a
href="https://github.com/collectiveidea/delayed_job">Delayed::Job</a> -
Database backed asynchronous priority queue.</li>
<li><a href="https://github.com/bensheldon/good_job">GoodJob</a> -
GoodJob is a multithreaded, Postgres-based, ActiveJob backend for Ruby
on Rails.</li>
<li><a href="https://github.com/chaps-io/gush">Gush</a> - A parallel
runner for complex workflows using only Redis and Sidekiq.</li>
<li><a href="https://github.com/Shopify/job-iteration">JobIteration</a>
- An ActiveJob extension to make long-running jobs interruptible and
resumable.</li>
<li><a href="https://github.com/karafka/karafka">Karafka</a> - Framework
used to simplify Apache Kafka (a distributed streaming platform) based
Ruby applications development.</li>
<li><a href="https://github.com/bia-technologies/lowkiq">Lowkiq</a> -
Ordered processing of background jobs for cases where Sidekiq can’t
help.</li>
<li><a href="https://github.com/ruby-amqp/march_hare">March Hare</a> -
Idiomatic, fast and well-maintained JRuby client for RabbitMQ.</li>
<li><a href="https://github.com/resque/resque">Resque</a> - A
Redis-backed Ruby library for creating background jobs.</li>
<li><a href="https://github.com/chanks/que">Que</a> - A Ruby job queue
that uses PostgreSQL’s advisory locks for speed and reliability.</li>
<li><a href="http://rocketjob.io">RocketJob</a> - Enterprise Batch
Processing System focused on performance, scalability, reliability, and
visibility of every job in the system. Outgrown existing solutions? Or,
start small and scale up later.</li>
<li><a href="https://github.com/phstc/shoryuken">Shoryuken</a> - A super
efficient AWS SQS thread based message processor for Ruby.</li>
<li><a href="https://sidekiq.org">Sidekiq</a> - A full-featured
background processing framework for Ruby. It aims to be simple to
integrate with any modern Rails application and much higher performance
than other existing solutions.</li>
<li><a
href="https://github.com/fatkodima/sidekiq-iteration">SidekiqIteration</a>
- A Sidekiq extension to make long-running jobs interruptible and
resumable.</li>
<li><a href="https://github.com/jondot/sneakers">Sneakers</a> - A fast
background processing framework for Ruby and RabbitMQ.</li>
<li><a href="https://github.com/brandonhilkert/sucker_punch">Sucker
Punch</a> - A single process background processing library using
Celluloid. Aimed to be Sidekiq’s little brother.</li>
</ul>
<h2 id="rails-application-generators">Rails Application Generators</h2>
<ul>
<li><a href="https://github.com/xdite/bootstrappers">Bootstrappers</a> -
Bootstrappers generates a base Rails app using Bootstrap template and
other goodies.</li>
<li><a href="https://github.com/Hobo/hobo">Hobo</a> - The web app
builder for Rails.</li>
<li><a href="https://github.com/nickjj/orats">orats</a> - Opinionated
rails application templates.</li>
<li><a href="https://github.com/RailsApps/rails-composer">Rails
Composer</a> - The Rails generator on steroids for starter apps.</li>
<li><a href="https://github.com/carbonfive/raygun">Raygun</a> - Builds
applications with the common customization stuff already done.</li>
<li><a href="https://github.com/thoughtbot/suspenders">Suspenders</a> -
Suspenders is the base Rails application used at thoughtbot.</li>
</ul>
<h2 id="robotics">Robotics</h2>
<ul>
<li><a href="https://github.com/kigster/arli">Arli</a> - Arli is the CLI
tool for searching, installing, and packaging Arduino libraries with a
project using a YAML-based Arlifile. It’s a “Bundler for Arduino
Development”.</li>
<li><a href="http://artoo.io">Artoo</a> - Next generation robotics
framework with support for different platforms: Arduino, Leap Motion,
Pebble, Raspberry Pi, etc.</li>
</ul>
<h2 id="rss">RSS</h2>
<ul>
<li><a href="https://github.com/aasmith/feed-normalizer">Feed
normalizer</a> - Extensible Ruby wrapper for Atom and RSS parsers.</li>
<li><a href="https://github.com/feedjira/feedjira">Feedjira</a> - A feed
fetching and parsing library.</li>
<li><a href="https://github.com/feedparser/feedparser">feedparser</a> -
A feed parser and normalizer (Atom, RSS, JSON, etc) library.</li>
<li><a href="https://github.com/cardmagic/simple-rss">Simple rss</a> - A
simple, flexible, extensible, and liberal RSS and Atom reader.</li>
<li><a href="https://github.com/swanson/stringer">Stringer</a> - A
self-hosted, anti-social RSS reader.</li>
</ul>
<h2 id="serverless">Serverless</h2>
<ul>
<li><a href="https://faastruby.io">FaaStRuby</a> - Serverless Software
Development Platform for Ruby and Crystal developers.</li>
<li><a href="https://github.com/tongueroo/jets">Jets</a> - A Ruby
Serverless Framework to create and deploy serverless microservices with
ease, and to seamlessly glue AWS services.</li>
<li><a href="https://lamby.custominktech.com/">🐑 Lamby</a> - Simple
Rails &amp; AWS Lambda Integration using Rack</li>
</ul>
<h2 id="scheduling">Scheduling</h2>
<ul>
<li><a href="https://github.com/jamesrwhite/minicron">minicron</a> - A
system to manage and monitor cron jobs.</li>
<li><a
href="https://github.com/hlascelles/que-scheduler">que-scheduler</a> - A
lightweight cron scheduler for the async job worker Que.</li>
<li><a
href="https://github.com/resque/resque-scheduler">resque-scheduler</a> -
A light-weight job scheduling system built on top of Resque.</li>
<li><a
href="https://github.com/jmettraux/rufus-scheduler">rufus-scheduler</a>
- Job scheduler for Ruby (at, cron, in and every jobs).</li>
<li><a href="https://github.com/jjb/ruby-clock">ruby-clock</a> - A job
scheduler which runs jobs each in their own thread in a persistent
process.</li>
<li><a
href="https://github.com/ondrejbartas/sidekiq-cron">Sidekiq-Cron</a> - A
scheduling add-on for Sidekiq.</li>
<li><a href="https://github.com/simplymadeapps/simple_scheduler">Simple
Scheduler</a> - An enhancement for Heroku Scheduler + Sidekiq for
scheduling jobs at specific times with a readable YML file.</li>
<li><a href="https://github.com/javan/whenever">Whenever</a> - A Ruby
gem that provides a clear syntax for writing and deploying cron
jobs.</li>
</ul>
<h2 id="scientific">Scientific</h2>
<ul>
<li>Bindings
<ul>
<li><a href="https://github.com/mrkn/pycall.rb">PyCall</a> - Calling
Python functions from the Ruby language.</li>
<li><a href="https://github.com/ruby-opencv/ruby-opencv">ruby-opencv</a>
- An OpenCV wrapper for Ruby.</li>
</ul></li>
<li>Classifiers
<ul>
<li><a
href="https://github.com/jekyll/classifier-reborn">classifier-reborn</a>
- An active fork of Classifier, and general module to allow Bayesian and
other types of classifications.</li>
</ul></li>
<li>Data analysis/structures
<ul>
<li><a href="https://github.com/v0dro/daru">daru</a> - A library for
storage, analysis, manipulation and visualization of data in pure
Ruby.</li>
<li><a href="https://github.com/SciRuby/daru-view">Daru::View</a> - A
library for easy and interactive plotting on Jupyter Notebooks and web
applications.</li>
<li><a href="https://github.com/monora/rgl">Rgl</a> - A framework for
graph data structures and algorithms.</li>
</ul></li>
<li>Numerical arrays
<ul>
<li><a href="https://github.com/sciruby/nmatrix">NMatrix</a> - Fast
numerical linear algebra library for Ruby.</li>
<li><a href="https://github.com/ruby-numo/numo-narray">Numo::NArray</a>
- N-dimensional Numerical Array for Ruby.</li>
<li><a href="https://github.com/rbotafogo/mdarray">mdarray</a> - Multi
dimensional array implemented for JRuby inspired by NumPy.</li>
</ul></li>
<li><a href="https://github.com/red-data-tools">Red Data Tools</a> -
Data processing tools for Ruby.</li>
<li><a href="https://github.com/sciruby/sciruby">SciRuby</a> - Tools for
scientific computation in Ruby/Rails.
<ul>
<li><a href="https://github.com/SciRuby/iruby">IRuby</a> - A Ruby kernel
for Jupyter.</li>
<li><a href="https://github.com/sciruby/statsample">statsample</a> - A
suite for basic and advanced statistics on Ruby.</li>
<li><a
href="https://github.com/sciruby/statsample-timeseries">statsample-timeseries</a>
- Bioruby Statsample TimeSeries.</li>
<li><a
href="https://github.com/sciruby/statsample-glm">statsample-glm</a> -
Generalized Linear Models extension for Statsample.</li>
<li><a href="https://github.com/sciruby/distribution">distribution</a> -
Statistical Distributions multi library wrapper.</li>
<li><a href="https://github.com/sciruby/minimization">minimization</a> -
Minimization algorithms on pure Ruby.</li>
</ul></li>
<li>Specific
<ul>
<li><a href="https://github.com/bioruby/bioruby">BioRuby</a> - Library
for developing bioinformatics software.</li>
<li><a
href="https://github.com/igrigorik/bloomfilter-rb">bloomfilter-rb</a> -
BloomFilter(s) in Ruby: Native counting filter + Redis
counting/non-counting filters.</li>
<li><a href="https://github.com/igrigorik/decisiontree">decisiontree</a>
- A ruby library which implements ID3 (information gain) algorithm for
decision tree learning.</li>
</ul></li>
<li>Utilities
<ul>
<li><a href="https://github.com/kanwei/algorithms">algorithms</a> -
Library with documentation on when to use a particular
structure/algorithm.</li>
<li><a
href="https://github.com/tonytonyjan/jaro_winkler">jaro_winkler</a> -
Ruby &amp; C implementation of Jaro-Winkler distance algorithm which
supports UTF-8 string.</li>
<li><a href="https://github.com/jzakiya/primes-utils">primes-utils</a> -
A Rubygem which provides a suite of extremely fast utility methods for
testing and generating primes.</li>
<li><a href="https://github.com/jzakiya/roots">Roots</a> - A Rubygem
which provides utilities to find all the nth roots of real and complex
values.</li>
<li><a href="https://github.com/tilo/smarter_csv">smarter_csv</a> - Ruby
Gem for smarter importing of CSV Files as Array(s) of Hashes.</li>
</ul></li>
</ul>
<h2 id="search">Search</h2>
<ul>
<li><a href="https://github.com/toptal/chewy">chewy</a> - High-level
Elasticsearch Ruby framework based on the official elasticsearch-ruby
client.</li>
<li><a
href="https://github.com/elastic/elasticsearch-ruby">elasticsearch-ruby</a>
- Ruby integrations for Elasticsearch.</li>
<li><a href="https://github.com/printercu/elastics-rb">elastics</a> -
Simple ElasticSearch client with support for migrations and ActiveRecord
integration.</li>
<li><a href="https://github.com/heartcombo/has_scope">has_scope</a> -
Has scope allows you to easily create controller filters based on your
resources named scopes.</li>
<li><a href="https://github.com/mauriciozaffari/mongoid_search">Mongoid
Search</a> - Simple full text search implementation for Mongoid.</li>
<li><a href="https://github.com/Casecommons/pg_search">pg_search</a> -
Builds ActiveRecord named scopes that take advantage of PostgreSQL’s
full text search.</li>
<li><a
href="https://github.com/activerecord-hackery/ransack/">ransack</a> -
Object-based searching.</li>
<li><a href="https://github.com/ranguba/rroonga">Rroonga</a> - The Ruby
bindings of Groonga.</li>
<li><a
href="https://github.com/wvanbergen/scoped_search">scoped_search</a> -
Adds a scope supporting search queries and autocompletion against
existing fields on ActiveRecord models and associations.</li>
<li><a href="https://github.com/mrkamel/search_cop">SearchCop</a> -
Extends your ActiveRecord models to support fulltext search engine like
queries via simple query strings and hash-based queries.</li>
<li><a href="https://github.com/ankane/searchkick">Searchkick</a> -
Searchkick learns what your users are looking for. As more people
search, it gets smarter and the results get better. It’s friendly for
developers - and magical for your users.</li>
<li><a href="https://github.com/sunspot/sunspot">Sunspot</a> - A Ruby
library for expressive, powerful interaction with the Solr search
engine.</li>
<li><a href="https://github.com/textacular/textacular">textacular</a> -
Exposes full text search capabilities from PostgreSQL, and allows you to
declare full text indexes. Textacular extends ActiveRecord with
named_scope methods making searching easy and fun!</li>
<li><a href="https://github.com/pat/thinking-sphinx">Thinking Sphinx</a>
- A library for connecting ActiveRecord to the Sphinx full-text search
tool.</li>
</ul>
<h2 id="security">Security</h2>
<ul>
<li><a href="http://beefproject.com">BeEF</a> - BeEF is short for The
Browser Exploitation Framework. It is a penetration testing tool that
focuses on the web browser.</li>
<li><a href="https://github.com/rubysec/bundler-audit">bundler-audit</a>
- Patch-level security verification for Bundler.</li>
<li><a href="https://github.com/erwanlr/Fingerprinter">Fingerprinter</a>
- CMS/LMS/Library etc versions fingerprinter.</li>
<li><a href="https://github.com/noraj/haiti">haiti</a> - Hash type
identifier (CLI &amp; lib).</li>
<li><a
href="https://github.com/rapid7/metasploit-framework">Metasploit</a> -
World’s most used penetration testing software.</li>
<li><a href="https://github.com/digininja/pipal">Pipal</a> - Password
analyser and statistics generator</li>
<li><a
href="https://github.com/kickstarter/rack-attack">Rack::Attack</a> -
Rack middleware for blocking &amp; throttling abusive requests.</li>
<li><a
href="https://github.com/sinatra/sinatra/tree/master/rack-protection">Rack::Protection</a>
- Rack middleware for protecting against typical Web attacks.</li>
<li><a href="https://github.com/ronin-rb/ronin">Ronin</a> - A Ruby
platform for vulnerability research and exploit development.</li>
<li><a href="https://github.com/twitter/secureheaders">SecureHeaders</a>
- Automatically apply several headers that are related to security,
including: Content Security Policy (CSP), HTTP Strict Transport Security
(HSTS), X-Frame-Options (XFO), X-XSS-Protection, X-Content-Type-Options,
X-Download-Options &amp; X-Permitted-Cross-Domain-Policies.</li>
<li><a href="https://github.com/urbanadventurer/WhatWeb">WhatWeb</a> -
Website Fingerprinter.</li>
<li><a href="http://wpscan.org/">WPscan</a> - WordPress vulnerability
scanner.</li>
</ul>
<h2 id="services-and-apps">Services and Apps</h2>
<p>Online tools, services and APIs to simplify development.</p>
<ul>
<li><a href="https://appsignal.com">AppSignal</a> - Better monitoring
for your Rails applications.</li>
<li><a href="https://www.codacy.com">Codacy</a> - Automated Code Review
for Ruby, Rails, JS, PHP, Python etc. Security, Coverage &amp;
Quality.</li>
<li><a href="https://codeclimate.com">CodeClimate</a> - Quality &amp;
security analysis for Ruby on Rails and Javascript.</li>
<li><a href="https://github.com">GitHub</a> - Powerful collaboration,
code review, and code management for open source and private
projects.</li>
<li><a href="https://about.gitlab.com/gitlab-ci/">Gitlab CI</a> -
Integrate with your GitLab to run tests for your projects.</li>
<li><a href="https://about.gitlab.com">GitLab</a> - Open source software
to collaborate on code.</li>
<li><a href="https://houndci.com">HoundCI</a> - Review your Ruby code
for style guide violations.</li>
<li><a href="https://inch-ci.org/">Inch CI</a> - Documentation badges
for Ruby projects.</li>
<li><a
href="https://github.com/OctoLinker/browser-extension">OctoLinker</a> -
Navigate through projects on GitHub.com efficiently with the OctoLinker
browser extension.</li>
<li><a href="https://semaphoreci.com">SemaphoreCI</a> - Hosted
continuous integration and deployment service for open source and
private projects.</li>
<li><a href="https://travis-ci.com">Travis CI</a> - Test and Deploy Your
Code with Confidence.</li>
</ul>
<h2 id="seo">SEO</h2>
<ul>
<li><a href="https://github.com/norman/friendly_id">FriendlyId</a> - The
“Swiss Army bulldozer” of slugging and permalink plugins for Active
Record.</li>
<li><a href="https://github.com/kpumuk/meta-tags">MetaTags</a> - A gem
to make your Rails application SEO-friendly.</li>
<li><a
href="https://github.com/prerender/prerender_rails">prerender_rails</a>
- Rails middleware gem for prerendering javascript-rendered pages on the
fly for SEO.</li>
<li><a
href="https://github.com/kjvarga/sitemap_generator">SitemapGenerator</a>
- A framework-agnostic XML Sitemap generator written in Ruby.</li>
</ul>
<h2 id="social-networking">Social Networking</h2>
<ul>
<li><a href="https://github.com/decidim/decidim">Decidim</a> - free
open-source participatory democracy for cities and organizations</li>
<li><a href="https://github.com/diaspora/diaspora">diaspora*</a> - A
privacy aware, distributed, open source social network.</li>
<li><a href="https://github.com/discourse/discourse">Discourse</a> - A
platform for community discussion. Free, open, simple.</li>
<li><a href="https://github.com/mailboxer/mailboxer">Mailboxer</a> - A
private message system for Rails applications.</li>
<li><a href="https://github.com/Gargron/mastodon">Mastodon</a> - A GNU
Social-compatible microblogging server.</li>
<li><a href="https://github.com/Retrospring/retrospring">Retrospring</a>
- A social network following the Q/A (question and answer)
principle.</li>
<li><a href="https://github.com/Timrael/social_shares">Social Shares</a>
- A gem to check how many times url was shared in social networks.</li>
<li><a href="https://github.com/thredded/thredded">Thredded</a> - Rails
4.2+ forums/messageboards engine. Its goal is to be as simple and
feature rich as possible.</li>
</ul>
<h2 id="spreadsheets-and-documents">Spreadsheets and Documents</h2>
<ul>
<li><a href="https://github.com/caxlsx/caxlsx">CAXLSX</a> - A community
maintained excel xlsx generation library. <a
href="https://github.com/randym/axlsx">AXLSX</a> - The original.</li>
<li><a href="http://documentcloud.github.io/docsplit">Docsplit</a> - Gem
to convert Microsoft Word (and other) documents into images, pdf, pages
or text.</li>
<li><a href="https://github.com/roo-rb/roo">Roo</a> - Implements read
access for all spreadsheet types and read/write access for Google
spreadsheets.</li>
<li><a
href="https://github.com/westonganger/spreadsheet_architect">spreadsheet_architect</a>
- Spreadsheet Architect is a library that allows you to create XLSX,
ODS, or CSV spreadsheets super easily from ActiveRecord relations, plain
Ruby objects, or tabular data.</li>
</ul>
<h2 id="state-machines">State Machines</h2>
<ul>
<li><a href="https://github.com/aasm/aasm">AASM</a> - State machines for
Ruby classes (plain Ruby, Rails Active Record, Mongoid).</li>
<li><a
href="https://github.com/peter-murach/finite_machine">FiniteMachine</a>
- A plain Ruby state machine with a straightforward and expressive
syntax.</li>
<li><a href="https://github.com/soveran/micromachine">MicroMachine</a> -
A minimal finite state machine implementation in less than 50 lines of
code.</li>
<li><a
href="https://github.com/svenfuchs/simple_states">simple_states</a> - A
super-slim statemachine-like support library.</li>
<li><a href="https://github.com/gocardless/statesman">Statesman</a> - A
statesmanlike state machine library.</li>
<li><a
href="https://github.com/state-machines/state_machines">state_machines</a>
- Adds support for creating state machines for attributes on any Ruby
class.</li>
<li><a href="https://github.com/troessner/transitions">transitions</a> -
A ruby state machine implementation.</li>
<li><a href="https://github.com/geekq/workflow">Workflow</a> - A
finite-state-machine-inspired API for modeling and interacting with what
we tend to refer to as ‘workflow’.</li>
</ul>
<h2 id="static-site-generation">Static Site Generation</h2>
<ul>
<li><a href="https://github.com/bridgetownrb/bridgetown">Bridgetown</a>
- A Webpack-aware, Ruby-powered static site generator for the modern
Jamstack era.</li>
<li><a href="https://github.com/thoughtbot/high_voltage">High
Voltage</a> - Easily include static pages in your Rails app.</li>
<li><a href="https://jekyllrb.com">Jekyll</a> - Transform your plain
text into static websites and blogs.
<ul>
<li><a href="https://github.com/planetjekyll/awesome-jekyll">Awesome
Jekyll</a> - A collection of awesome Jekyll tools, plugins, themes,
guides and much more.</li>
</ul></li>
<li><a href="http://middlemanapp.com">Middleman</a> - A static site
generator using all the shortcuts and tools in modern web
development.</li>
<li><a href="http://nanoc.ws/">Nanoc</a> - A static site generator, fit
for building anything from a small personal blog to a large corporate
web site.</li>
<li><a href="https://github.com/henrylawson/photish">Photish</a> -
Generate a highly configurable static website from a photo
collection.</li>
<li><a href="http://webgen.gettalong.org">webgen</a> - webgen is a fast,
powerful and extensible static website generator.</li>
</ul>
<h2 id="template-engine">Template Engine</h2>
<ul>
<li><a href="https://github.com/zendesk/curly">Curly</a> - A template
language that completely separates structure and logic.</li>
<li><a href="https://github.com/haml/haml">Haml</a> - HTML Abstraction
Markup Language.</li>
<li><a href="https://github.com/Shopify/liquid">Liquid</a> - Safe,
customer facing template language for flexible web apps.</li>
<li><a href="https://github.com/mustache/mustache">Mustache</a> -
Logic-less Ruby templates.</li>
<li><a href="https://github.com/slim-template/slim">Slim</a> - A
template language whose goal is reduce the syntax to the essential parts
without becoming cryptic.</li>
<li><a href="https://github.com/rtomayko/tilt">Tilt</a> - Generic
interface to multiple Ruby template engines.</li>
</ul>
<h2 id="testing">Testing</h2>
<ul>
<li>Frameworks
<ul>
<li><a href="https://github.com/rspec/rspec">RSpec</a> - Behaviour
Driven Development for Ruby.
<ul>
<li>Formatters
<ul>
<li><a href="https://github.com/cupakromer/emoji-rspec">Emoji-RSpec</a>
- Custom Emoji Formatters for RSpec.</li>
<li><a href="https://github.com/thekompanee/fuubar">Fuubar</a> - The
instafailing RSpec progress bar formatter.</li>
<li><a href="https://github.com/mattsears/nyan-cat-formatter">Nyan
Cat</a> - Nyan Cat inspired RSpec formatter!</li>
</ul></li>
</ul></li>
<li><a href="https://github.com/cucumber/aruba">Aruba</a> - Testing
command line applications with cucumber and rspec.</li>
<li><a href="https://github.com/chneukirchen/bacon">Bacon</a> - A small
RSpec clone.</li>
<li><a href="https://github.com/teamcapybara/capybara">Capybara</a> -
Acceptance test framework for web applications.</li>
<li><a href="https://github.com/cucumber/cucumber">Cucumber</a> - BDD
that talks to domain experts first and code second.</li>
<li><a href="https://github.com/djanowski/cutest">Cutest</a> - Isolated
tests in Ruby.</li>
<li><a href="https://github.com/fixrb/fix">Fix</a> - Specing framework
for Ruby.</li>
<li><a href="https://github.com/strongqa/howitzer">Howitzer</a> - Ruby
based framework for acceptance testing</li>
<li><a href="https://github.com/seattlerb/minitest">minitest</a> -
minitest provides a complete suite of testing facilities supporting TDD,
BDD, mocking, and benchmarking.</li>
<li><a href="https://github.com/freerange/mocha">Mocha</a> - Mocha is a
mocking and stubbing library for Ruby.</li>
<li><a href="https://github.com/rr/rr">RR</a> - A test double framework
that features a rich selection of double techniques and a terse
syntax.</li>
<li><a
href="https://github.com/thoughtbot/shoulda-matchers">shoulda-matchers</a>
- Provides Test::Unit- and RSpec-compatible one-liners that test common
Rails functionality. These tests would otherwise be much longer, more
complex, and error-prone.</li>
<li><a href="https://github.com/codegram/spinach">Spinach</a> - Spinach
is a high-level BDD framework that leverages the expressive Gherkin
language (used by Cucumber) to help you define executable specifications
of your application or library’s acceptance criteria.</li>
<li><a href="https://github.com/test-bench/test-bench">TestBench</a> -
TestBench is a principled test framework for Ruby and MRuby aiming to
offer precisely what is needed to test well-designed code effectively
and easily.</li>
<li><a href="http://test-unit.github.io">Test::Unit</a> - Test::Unit is
a xUnit family unit testing framework for Ruby.</li>
</ul></li>
<li>Fake Data
<ul>
<li><a href="http://fabricationgem.org/">Fabrication</a> - A simple and
powerful object generation library.</li>
<li><a href="https://github.com/thoughtbot/factory_bot">factory_bot</a>
- A library for setting up Ruby objects as test data.</li>
<li><a href="https://github.com/adamcooke/fake-person">Fake Person</a> -
Uses some of the most popular given &amp; surnames in the US &amp;
UK.</li>
<li><a href="https://github.com/stympy/faker">faker</a> - A library for
generating fake data such as names, addresses, and phone numbers.</li>
<li><a href="https://github.com/ffaker/ffaker">ffaker</a> - A faster
Faker, generates dummy data, rewrite of faker.</li>
<li><a href="https://github.com/sevenwire/forgery">Forgery</a> - Easy
and customizable generation of forged data.</li>
</ul></li>
<li>Mock
<ul>
<li><a href="https://github.com/zeisler/active_mocker">ActiveMocker</a>
- Generate mocks from ActiveRecord models for unit tests that run fast
because they don’t need to load Rails or a database.</li>
<li><a href="https://github.com/mocktools/ruby-dns-mock">DnsMock</a> -
Ruby DNS mock. Mimic any DNS records for your test environment and even
more.</li>
<li><a href="https://github.com/iridakos/duckrails">DuckRails</a> - Tool
for mocking API endpoints quickly &amp; dynamically.</li>
<li><a href="https://github.com/mocktools/ruby-smtp-mock">SmtpMock</a> -
Ruby SMTP mock. Mimic any SMTP server behaviour for your test
environment with fake SMTP server.</li>
<li><a href="https://github.com/alovak/test_xml">TestXml</a> - TestXml
is a small extension for testing XML/HTML.</li>
<li><a href="https://github.com/bblimke/webmock">WebMock</a> - Library
for stubbing and setting expectations on HTTP requests.</li>
</ul></li>
<li>WebDrivers
<ul>
<li><a href="https://github.com/rubycdp/ferrum">Ferrum</a> - High-level
API to control Chrome in Ruby.</li>
<li><a
href="https://github.com/teampoltergeist/poltergeist">Poltergeist</a> -
A PhantomJS driver for Capybara.</li>
<li><a
href="https://github.com/SeleniumHQ/selenium/tree/master/rb">Selenium
WebDriver</a> - Ruby bindings for WebDriver.</li>
<li><a href="https://github.com/watir/watir/">Watir</a> - Web
application testing in Ruby.</li>
</ul></li>
<li>Extra
<ul>
<li><a href="https://github.com/thoughtbot/appraisal">Appraisal</a> -
Appraisal integrates with bundler and rake to test your library against
different versions of dependencies.</li>
<li><a href="https://github.com/enkessler/cql">CQL</a> - CQL is a
library for making queries against Cucumber style test suites.</li>
<li><a href="https://github.com/enkessler/cuke_modeler">cuke_modeler</a>
- An modeling library for <code>.feature</code> files that is an
abstration layer on top of the <code>gherkin</code> gem, providing a
stable base upon which to build other Gherkin related tools.</li>
<li><a href="https://github.com/openSUSE/gitarro">gitarro</a> - Run,
retrigger, handle all type and OS-independent tests against your GitHub
Pull Requests.</li>
<li><a href="https://github.com/ArturT/knapsack">Knapsack</a> - Optimal
test suite parallelisation across CI nodes for RSpec, Cucumber,
Minitest, Spinach and Turnip.</li>
<li><a href="https://github.com/mbj/mutant">mutant</a> - Mutant is a
mutation testing tool for Ruby.</li>
<li><a href="https://github.com/grosser/parallel_tests">Parallel
Tests</a> - Speedup Test::Unit + RSpec + Cucumber by running parallel on
multiple CPUs (or cores).</li>
<li><a href="https://github.com/k-tsj/power_assert">power_assert</a> -
Power Assert for Ruby.</li>
<li><a href="https://github.com/flood-io/ruby-jmeter">Ruby-JMeter</a> -
A Ruby based DSL for building JMeter test plans.</li>
<li><a href="https://github.com/rails/spring">Spring</a> - Preloads your
rails environment in the background for faster testing and Rake
tasks.</li>
<li><a href="https://github.com/travisjeffery/timecop">timecop</a> -
Provides “time travel” and “time freezing” capabilities, making it dead
simple to test time-dependent code.</li>
<li><a href="https://github.com/serpapi/turbo_tests">Turbo Tests</a> -
Run RSpec tests on multiple cores. Like <code>parallel_tests</code> but
with incremental summarized output.</li>
<li><a href="https://github.com/vcr/vcr">vcr</a> - Record your test
suite’s HTTP interactions and replay them during future test runs for
fast, deterministic, accurate tests.</li>
<li><a href="https://github.com/BBC-News/wraith">Wraith</a> - A
responsive screenshot comparison tool.</li>
<li><a href="https://github.com/Nedomas/zapata">Zapata</a> - Who has
time to write tests? This is a revolutionary tool to make them write
themselves.</li>
</ul></li>
</ul>
<h2 id="third-party-apis">Third-party APIs</h2>
<ul>
<li><a href="https://github.com/ably/ably-ruby">Ably</a> - Ruby library
for realtime communication over Ably.</li>
<li><a href="https://github.com/bufferapp/buffer-ruby">Buffer</a> -
Buffer API Ruby Library</li>
<li><a href="https://github.com/meew0/discordrb">discordrb</a> - An
implementation of the Discord API.</li>
<li><a href="https://github.com/Jesus/dropbox_api">Dropbox</a> - Ruby
client for Dropbox API v2.</li>
<li><a href="https://github.com/nov/fb_graph2">fb_graph2</a> - A
full-stack Facebook Graph API wrapper.</li>
<li><a href="https://github.com/RaVbaker/flickr">flickr</a> - A Ruby
interface to the Flickr API.</li>
<li><a href="https://github.com/NARKOZ/gitlab">gitlab</a> - Ruby wrapper
and CLI for the GitLab API.</li>
<li><a
href="https://github.com/googleads/google-api-ads-ruby">google-api-ads-ruby</a>
- Google Adwords Ruby client</li>
<li><a href="https://github.com/gmailgem/gmail">gmail</a> - A Rubyesque
interface to Gmail, with all the tools you’ll need.</li>
<li><a href="https://github.com/hipchat/hipchat-rb">hipchat-rb</a> -
HipChat HTTP API Wrapper in Ruby with Capistrano hooks.</li>
<li><a
href="https://github.com/Instagram/instagram-ruby-gem">instagram-ruby-gem</a>
- The official gem for the Instagram REST and Search APIs.</li>
<li><a
href="https://github.com/sshaw/itunes_store_transporter">itunes_store_transporter</a>
- Ruby wrapper around Apple’s iTMSTransporter program.</li>
<li><a href="https://github.com/hexgnu/linkedin">linkedin</a> - Provides
an easy-to-use wrapper for LinkedIn’s REST APIs.</li>
<li><a href="https://github.com/orbit-love/notion-ruby-client">Notion
Ruby Client</a> - A Ruby wrapper for the Notion API.</li>
<li><a href="http://octokit.github.io/octokit.rb">Octokit</a> - Ruby
toolkit for the GitHub API.</li>
<li><a href="https://github.com/pusher/pusher-http-ruby">Pusher</a> -
Ruby server library for the Pusher API.</li>
<li><a href="https://github.com/ejholmes/restforce">Restforce</a> - A
Ruby client for the Salesforce REST api.</li>
<li><a href="https://github.com/dcparker/ruby-gmail">ruby-gmail</a> - A
Rubyesque interface to Gmail.</li>
<li><a
href="https://github.com/jeremytregunna/ruby-trello">ruby-trello</a> -
Implementation of the Trello API for Ruby.</li>
<li><a
href="https://github.com/kciter/simple-slack-bot">simple-slack-bot</a> -
You can easily make Slack Bot.</li>
<li><a href="https://github.com/stevenosloan/slack-notifier">Slack
Notifier</a> - A simple wrapper for posting to Slack channels.</li>
<li><a href="https://github.com/aki017/slack-ruby-gem">Slack ruby
gem</a> - A Ruby wrapper for the Slack API.</li>
<li><a
href="https://github.com/soundcloud/soundcloud-ruby">soundcloud-ruby</a>
- Official SoundCloud API Wrapper for Ruby.</li>
<li><a href="https://github.com/sferik/t">t</a> - A command-line power
tool for Twitter.</li>
<li><a href="https://github.com/keepcosmos/terjira">terjira</a> - A
command-line power tool for Jira.</li>
<li><a href="https://github.com/tweetstream/tweetstream">tweetstream</a>
- A simple library for consuming Twitter’s Streaming API.</li>
<li><a href="https://github.com/twilio/twilio-ruby">twilio-ruby</a> - A
module for using the Twilio REST API and generating valid TwiML.</li>
<li><a href="https://github.com/sferik/twitter">twitter</a> - A Ruby
interface to the Twitter API.</li>
<li><a
href="https://github.com/ignacio-chiazzo/ruby_whatsapp_sdk">whatsapp-sdk</a>
- Ruby client for the Whatsapp API.</li>
<li><a href="https://github.com/kenpratt/wikipedia-client">wikipedia</a>
- Ruby client for the Wikipedia API.</li>
<li><a href="https://github.com/Fullscreen/yt">Yt</a> - An
object-oriented Ruby client for YouTube API V3.</li>
</ul>
<h2 id="video">Video</h2>
<ul>
<li><a href="https://github.com/streamio/streamio-ffmpeg">Streamio
FFMPEG</a> - Simple yet powerful wrapper around the ffmpeg command for
reading metadata and transcoding movies.</li>
<li><a href="https://github.com/thibaudgg/video_info">VideoInfo</a> -
Get video info from Dailymotion, Vimeo, Wistia, and YouTube URLs.</li>
<li><a href="https://github.com/donmelton/video_transcoding">Video
Transcoding</a> - Tools to transcode, inspect and convert videos.</li>
</ul>
<h2 id="view-components">View components</h2>
<ul>
<li><a href="https://github.com/trailblazer/cells">Cells</a> - View
Components for Rails.</li>
<li><a href="https://github.com/komposable/komponent">Komponent</a> - An
opinionated way of organizing front-end code in Rails, based on
components.</li>
<li><a href="https://github.com/joeldrapper/phlex">Phlex</a> - A
framework for building object-oriented views in Ruby.</li>
<li><a href="https://github.com/github/view_component">ViewComponent</a>
- View components for Rails.</li>
</ul>
<h2 id="view-helpers">View helpers</h2>
<ul>
<li><a href="https://github.com/comfy/active_link_to">active_link_to</a>
- View helper to manage “active” state of a link.</li>
<li><a href="https://github.com/dejan/auto_html">auto_html</a> - Rails
extension for transforming URLs to appropriate resource (image, link,
YouTube, Vimeo video…).</li>
<li><a href="https://github.com/fullscreen/bh">Bh</a> - Bootstrap
Helpers for Ruby.</li>
<li><a href="https://github.com/gazay/gon">gon</a> - If you need to send
some data to your js files and you don’t want to do this with long way
through views and parsing - use gon.</li>
<li><a
href="https://github.com/peresleguine/pluggable_js">PluggableJs</a> -
Page-specific javascript for Rails applications with the ability of
passing data from a controller.</li>
<li><a
href="https://github.com/renderedtext/render_async">render_async</a> -
Render partials to your views asynchronously and increase load
performance of your pages.</li>
</ul>
<h2 id="web-crawling">Web Crawling</h2>
<ul>
<li><a
href="https://github.com/gottfrois/link_thumbnailer">LinkThumbnailer</a>
- Ruby gem that generates thumbnail images and videos from a given URL.
Much like popular social website with link preview.</li>
<li><a href="https://github.com/vifreefly/kimuraframework">Kimurai</a> -
A modern web scraping framework written in Ruby which works out of box
with Headless Chromium/Firefox, PhantomJS, or simple HTTP requests and
allows to scrape and interact with JavaScript rendered websites.</li>
<li><a href="https://github.com/sparklemotion/mechanize">Mechanize</a> -
Mechanize is a ruby library that makes automated web interaction
easy.</li>
<li><a
href="https://github.com/jaimeiniesta/metainspector">MetaInspector</a> -
Ruby gem for web scraping purposes.</li>
<li><a href="https://github.com/postmodern/spidr">Spidr</a> - A
versatile Ruby web spidering library that can spider a site, multiple
domains, certain links or infinitely. Spidr is designed to be fast and
easy to use.</li>
<li><a href="https://github.com/propublica/upton">Upton</a> - A
batteries-included framework for easy web-scraping.</li>
<li><a href="https://github.com/felipecsl/wombat">Wombat</a> - Web
scraper with an elegant DSL that parses structured data from web
pages.</li>
</ul>
<h2 id="web-frameworks">Web Frameworks</h2>
<ul>
<li><a href="https://github.com/camping/camping">Camping</a> - A web
microframework which consistently stays at less than 4kB of code.</li>
<li><a href="http://cuba.is">Cuba</a> - A microframework for web
development.</li>
<li><a href="https://github.com/patriciomacadden/hobbit">Hobbit</a> - A
minimalistic microframework built on top of Rack.</li>
<li><a href="http://hanamirb.org">Hanami</a> - It aims to bring back
Object Oriented Programming to web development, leveraging on a stable
API, a minimal DSL, and plain objects.</li>
<li><a href="https://hyperstack.org/">Hyperstack</a> - A Complete
Isomorphic Ruby Framework using React and Opal.</li>
<li><a href="http://www.padrinorb.com">Padrino</a> - A full-stack ruby
framework built upon Sinatra.</li>
<li><a href="https://pakyow.com/">Pakyow</a> - A framework for building
modern web-apps in Ruby. It helps you build working software faster with
a development process that remains friendly to both designers and
developers.</li>
<li><a href="https://github.com/rack-app/rack-app">Rack::App</a> - Bare
bone minimalistic framework for building rack apps.</li>
<li><a href="http://roda.jeremyevans.net/">Roda</a> - A routing tree web
framework.</li>
<li><a href="http://rubyonrails.org">Ruby on Rails</a> - A
web-application framework that includes everything needed to create
database-backed web applications according to the Model-View-Controller
(MVC) pattern.</li>
<li><a href="http://scorchedrb.com">Scorched</a> - Light-weight,
inheritable and composable web framework, inspired by Sinatra.</li>
<li><a href="http://www.sinatrarb.com">Sinatra</a> - Classy
web-development dressed in a DSL.</li>
<li><a href="https://github.com/soveran/syro/">Syro</a> - Simple router
for web applications.</li>
<li><a href="https://github.com/trailblazer/trailblazer">Trailblazer</a>
- Trailblazer is a thin layer on top of Rails. It gently enforces
encapsulation, an intuitive code structure and gives you an
object-oriented architecture.</li>
</ul>
<h2 id="web-servers">Web Servers</h2>
<ul>
<li><a href="https://github.com/ohler55/agoo">Agoo</a> - A high
performance HTTP server for Ruby that includes GraphQL and WebSocket
support.</li>
<li><a href="https://github.com/socketry/falcon">Falcon</a> - A
high-performance web server for Ruby, supporting HTTP/1, HTTP/2 and
TLS.</li>
<li><a href="https://github.com/boazsegev/iodine">Iodine</a> - An
non-blocking HTTP and Websocket web server optimized for Linux/BDS/macOS
and Ruby MRI.</li>
<li><a href="https://www.phusionpassenger.com">Phusion Passenger</a> -
Fast and robust web server and application server.</li>
<li><a href="https://github.com/puma/puma">Puma</a> - A modern,
concurrent web server for Ruby.</li>
<li><a href="http://rack.github.io">Rack</a> - A common Ruby web server
interface. By itself, it’s just a specification and utility library, but
all Ruby web servers implement this interface.</li>
<li><a href="https://github.com/macournoyer/thin">Thin</a> - Tiny, fast
&amp; funny HTTP server.</li>
<li><a href="https://github.com/torquebox/torquebox">TorqueBox</a> - A
Ruby application server built on JBoss AS7 and JRuby.</li>
<li><a href="http://unicorn.bogomips.org">Unicorn</a> - Rack HTTP server
for fast clients and Unix.</li>
</ul>
<h2 id="websocket">WebSocket</h2>
<ul>
<li><a href="http://anycable.io">AnyCable</a> – Polyglot replacement for
Ruby WebSocket servers with Action Cable protocol.</li>
<li><a href="https://github.com/hopsoft/cable_ready">CableReady</a> -
CableReady completes the ActionCable story and expands the utility of
web sockets in your Rails app.</li>
<li><a href="http://faye.jcoglan.com/ruby.html">Faye</a> - A set of
tools for simple publish-subscribe messaging between web clients.</li>
<li><a href="https://github.com/firehoseio/firehose">Firehose</a> -
Build realtime Ruby web applications.</li>
<li><a href="https://github.com/stevegraham/slanger">Slanger</a> - Open
Pusher implementation compatible with Pusher libraries.</li>
<li><a
href="https://github.com/hopsoft/stimulus_reflex">StimulusReflex</a> -
Build reactive applications with the Rails tooling you already know and
love.</li>
</ul>
<p><a href="https://github.com/Sdogruyol/awesome-ruby">ruby.md
Github</a></p>
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