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

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.

Lean & powerful HTTP apps

A Git platform powered by Scala with easy installation, high extensibility & GitHub API compatibility

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

Statsmodels: statistical modeling and econometrics in Python

JavaScript Vector Library

Extendable, adaptable rewrite of django.contrib.admin

CSS toolkit from Twitter for use as a WordPress theme

AngularJS service to handle Rest API Restful Resources properly and easily

A RESTful Haskell web framework built on WAI.

A static website compiler library in Haskell

Quickly ramp up in new programming languages.

Pure Go Postgres driver for database/sql

A serialization/deserialization/validation library for strings, mappings and lists.

The future of Node.js REST development

A Really Ruby Mail Library

TrinityCore Open Source MMO Framework (master = 7.3.5.26124, 3.3.5 = 3.3.5a.12340)

JavaScript parser / mangler / compressor / beautifier library for NodeJS

Linux utility to configure modifier keys to act as other keys when pressed and released on their own.

C++ client for making HTTP/REST requests

Give your JS App some Backbone with Models, Views, Collections, and Events

JavaScript's utility _ belt

Social logging script for Day One

Manage perl installations in your $HOME

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

A Content Editor for GitHub.

A lightweight, fast and extensible game server for Minecraft

Compresses linked and inline javascript or CSS into a single cached file.

PHPCI is a free and open source continuous integration tool specifically designed for PHP.

Write C# apps with a text editor, nuget and the power of Roslyn!

Active Record, improved. Live again :)

Object-based searching.

🆔 The easy-to-use OpenStreetMap editor in JavaScript.

Slick (Scala Language Integrated Connection Kit) is a modern database query and access library for Scala

A suite of scala libraries for building and consuming RESTful web services on top of Akka: lightweight, asynchronous, non-blocking, actor-based, testable

Git + .NET = ❤

RSpec Best Practices

Brew & manage PHP versions in pure PHP at HOME

A native macOS KeePass client

MailWatch for MailScanner is a web-based front-end to MailScanner

Messaging engine for the delivery of SMS, Star Menu and chat messages to diverse audiences in emerging markets and beyond.

Functional reactive programming library for TypeScript and JavaScript

Simple Rails app configuration

A platform for developing apps using JRuby on Android.

Web Experience Toolkit (WET): Open source code library for building innovative websites that are accessible, usable, interoperable, mobile-friendly and multilingual. This collaborative open source project is led by the Government of Canada.