Help out your favorite open source projects and become a better developer while doing it.

:gem: A fast, open source text processor and publishing toolchain, written in Ruby, for converting AsciiDoc content to HTML 5, DocBook 5, and other formats.

rubex - A Ruby-like language for writing Ruby C extensions.

:chart_with_upwards_trend: The Rack Based A/B testing framework

Wiki Education Foundation's Wikipedia course dashboard system

Forms made easy for Rails! It's tied to a simple DSL, with no opinion on markup.

Simple, but flexible HTTP client library, with support for multiple backends.

:chart_with_upwards_trend: The Rack Based A/B testing framework

Quickly ramp up in new programming languages.

Hashie is a collection of classes and mixins that make Ruby hashes more powerful.

RailsAdmin is a Rails engine that provides an easy-to-use interface for managing your data

A command-line power tool for Twitter.

FriendlyId is the “Swiss Army bulldozer” of slugging and permalink plugins for ActiveRecord. It allows you to create pretty URL’s and work with human-friendly strings as if they were numeric ids for ActiveRecord models.

Database-backed Active Job backend

Free, open source mental health communication web app to share experiences with loved ones

Prevents duplicate Sidekiq jobs

Multithreaded, Postgres-based, Active Job backend for Ruby on Rails.

Sentry SDK for Ruby

Open Source Event Manager. An event management tool tailored to Free and Open Source Software conferences.

Quickly ramp up in new programming languages.

Thor is a toolkit for building powerful command-line interfaces.

Pagination library for Rails and other Ruby applications

:tada: Makes http fun again!

Open data project for small-scale food growers

Classy web-development dressed in a DSL (official / canonical repo)

:globe_with_meridians: Jekyll is a blog-aware static site generator in Ruby

Flexible authentication solution for Rails with Warden.

Pretty print your Ruby objects with style -- in full color and with proper indentation

pg_search builds ActiveRecord named scopes that take advantage of PostgreSQL’s full text search

Resque is a Redis-backed Ruby library for creating background jobs, placing them on multiple queues, and processing them later.

An API focused facade that sits on top of an object model.

The Rails application that powers OpenStreetMap

Internationalization (i18n) library for Ruby

Main Website for The Odin Project

GitHub Classroom automates repository creation and access control, making it easy for teachers to distribute starter code and collect assignments on GitHub.

A modern, responsive admin framework for Ruby on Rails

Flexible authentication solution for Rails with Warden.

Fast, Nimble PDF Writer for Ruby

A tagging plugin for Rails applications that allows for custom tagging along dynamic contexts.

Simple, efficient background processing for Ruby

🍺 The missing package manager for macOS

A library for bulk insertion of data into your database using ActiveRecord.

Classic UI of ManageIQ

Computing-focused community centered around link aggregation and discussion

OpenTelemetry Ruby API & SDK, and related gems

Classier solution for file uploads for Rails, Sinatra and other Ruby web frameworks

A Ruby/Rack web server built for parallelism

Ruby: 2 CPUs = 2x Testing Speed for RSpec, Test::Unit and Cucumber

The Ruby Programming Language

A simple, Git-powered wiki with a sweet API and local frontend.

Reckoning Invoicing SaaS