Spree is a complete open source e-commerce solution built with Ruby on Rails.

RailsAdmin is a Rails 3 engine that provides an easy-to-use interface for managing your data.

Shoes is a cross-platform toolkit for writing graphical apps easily and artfully using Ruby.

A Ruby interface to the Twitter API.

The exceptionally handsome dashboard framework in Ruby and Coffeescript.

The Ruby on Rails application that powers the OpenStreetMap website and map editing API. Used by tens of thousands of contributors mapping the world.

Open source e-commerce for Ruby/Rails.

CocoaPods manages library dependencies for your Xcode project.

AASM - State machines for Ruby classes (plain Ruby, Rails Active Record, Mongoid)

The open source error catcher that's Airbrake API compliant

Serializers replace hash-driven development with object-oriented development

Classy web-development dressed in a DSL

A distributed build system for the open source community.

A privacy aware, distributed, open source social network

Gollum is a simple wiki system built on top of Git that powers GitHub Wikis. You can have your wiki and work on it offline, just like you would with your code.

A simple and lightweight mixin library for Sass

Language Savant. Recognize the language of files on github.com.

Better error page for Rails and other Rack apps

Asciidoctor is an open source text processor and publishing toolchain for transforming AsciiDoc markup into HTML 5, DocBook 4.5 and 5.0 and other custom formats.

Server automation framework and application