Analytics

Analytics for Heroku…

tool Metabase — a beta of Metadata as an app that can be deployed directly to Heroku.

Architecture

How to architect your Heroku projects…

article Exploring Microservices Architecure on Heroku — explores why Heroku eliminates a lot of the tooling you need to worry about when working with microservices.
article Heroku and SOA — discusses why Heroku is perfectly suited to building a service-oriented architecture for your projects.
article Split Frontend from Backend on Heroku with npm and NodeJS - hands-on guide to deploy a microservices web application in Heroku using npm and NodeJS.

Blogs around the internet that often (or exclusively) write about Heroku…

Resources that help with deploying on Heroku…

official Preboot — explains how to use the “Preboot” feature to enable zero-downtime deployments, which can be tricky to get right.
article Automating our Heroku deployments from Jenkins — explains how you’d go about automating certain parts of deployment like enabling maintenance mode, copying your database from production to staging, running migrations against staging, etc.
question How do you ignore files when deploying to Heroku? — the answer to a common question about .gitignore like functionality.
article Six Tips for Mastering your Procfile — improvements for how you run your Heroku processes.
article Deploying Django to Heroku With Docker — looks at how to deploy a Django app to Heroku with Docker via the Heroku Container Runtime

official Managing Multiple Environments for an App — a good primer on how to think about managing the different pieces of each environment.

Tips for using custom domain names on Heroku…

article Configuring CloudFlare DNS for a Heroku app — a walkthrough of how to use CloudFlare as your DNS provider.
article Hosting multiple Heroku apps on a single domain — an article on how to share the same domain between multiple Heroku applications.
question How do you host multiple Heroku apps on a single domain? — a StackOverflow question with a few responses to a the common question of how to serve multiple Heroku apps from different paths instead of subdomains.

General resources that cover lots of different things about Heroku…

book The Heroku Hacker’s Guide — an ebook that covers a lot of the basics in maintaining and scaling a project on Heroku.
book Heroku Cookbook — step-by-step recipes to solve the challenges of administering and scaling a real-world production web application on Heroku.

Anything dealing with Heroku Postgres…

official Heroku Postgres — the landing page explaining with it is.
plugin heroku-buildpack-pgbouncer — a buildpack that allows for transaction pooling using stunnel and pgbouncer to avoid hitting connection limits.

Anything dealing with Heroku Redis…

Resources that help you scale your Heroku projects…

tool HireFire — a SaaS tool that automatically scales your Heroku dynos up and down as load requires.

How to secure your Heroku applications…

article Set up CloudFlare’s free SSL on Heroku — walks you through the exact steps to setting up free SSL via Cloudflare.

Helpful resources for the Heroku Toolbelt…

official Toolbelt Download — where to download the Heroku toolbelt.
plugin heroku-accounts — makes it easy to work with multiple accounts at once from the command line.
plugin heroku-pg-extras — a toolbelt plugin that adds extra useful plugins for working with Postgres. Things like analyzing cache hit rates, outlier queries, unused indexes, table sizes, etc.