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.
The Ruby on Rails application that powers the OpenStreetMap website and map editing API. Used by tens of thousands of contributors mapping the world.
CocoaPods manages library dependencies for your Xcode project.
The open source error catcher that's Airbrake API compliant
Serializers replace hash-driven development with object-oriented development
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.