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

A Rails gem that lets you code surveys, questionnaires, quizzes, etc... and add them to your app.

The open source diagnostics platform for the web

Better error page for Rack apps

Realtime Client Server Framework for the JVM, supporting WebSockets with Cross-Browser Fallbacks

Less. The dynamic stylesheet language.

A programmer-oriented testing framework for Java.

A file and module loader for JavaScript

HTML 5 game platform for browser and mobile

Perl Dancer Next Generation (rewrite of Perl Dancer)

GitHub Command-line Utility.

ruby bindings to libgit2

scalastyle

An extension to the core Scala library for functional programming.

Etherpad: A modern really-real-time collaborative document editor.

The Racket repository

Source code of open-source Colobot: Gold Edition project developed by Epsitec and TerranovaTeam

For more information, please see http://smartos.org/ For any questions that aren't answered there, please join the SmartOS discussion list: https://smartos.topicbox.com/groups/smartos-discuss

PDF generation library for Clojure

A Ruby/Rack web server built for parallelism

Rails application preloader

The ultimate vim distribution

Free (libre) font editor for Windows, Mac OS X and GNU+Linux

cpanminus - get, unpack, build and install modules from CPAN

pushState + ajax = pjax

Acceptance test framework for web applications

Cucumber for the JVM

the easiest way to use Google Maps

The HTML5 ebook framework to publish interactive books & magazines on iPad & iPhone using simply open web standards

MarkPad - a visual Markdown editor (inspired by the Downmarker project)

Sublime Text 2 plugin for running ruby tests! (Unit, RSpec, Cucumber)

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.

Zotonic - The Erlang Web Framework & CMS

:tada: Makes http fun again!

Spring integration for Metrics

Play Framework

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

Official repository for IPython itself. Other repos in the IPython organization contain things like the website, documentation builds, etc.

JavaScript library for one-directional scrolling with item based navigation support.

browser asynchronous http requests

Generate custom icon webfonts from the comfort of the command line.

Cocoa wrappers and helpers for RubyMotion (Ruby for iOS and OS X) - Making Cocoa APIs more Ruby like, one API at a time. Fork away and send your pull requests

Kanban board for github issues

The HTML Presentation Framework

Grunt: The JavaScript Task Runner

Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.

Vagrant is a tool for building and distributing development environments.

Code coverage for Ruby with a powerful configuration library and automatic merging of coverage across test suites

Software to automate the management and configuration of any infrastructure or application at scale. Get access to the Salt software package repository here:

JSHint is a tool that helps to detect errors and potential problems in your JavaScript code

🔮 An easy-to-use JavaScript unit testing framework.