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

Multi-Dimensional charting built to work natively with crossfilter rendered with d3.js

Open Dylan compiler and IDE

Vi/Vim emulation for Sublime Text 3

A complete date/time library for Elixir projects.

HTTP request/response recording library for elixir, inspired by VCR.

Style iOS apps with a stylesheet, similar to CSS

The code that powers Voat

Quickly ramp up in new programming languages.

Golang framework for robotics, drones, and the Internet of Things (IoT)

Expose eclipse features inside of vim.

[Go] Package of validators and sanitizers for strings, numerics, slices and structs

A Powerful Collection Of Modules

Java based open source static site/blog generator for developers & designers.

Joda-Time is the widely used replacement for the Java date and time classes prior to Java SE 8.

Convert HTML and HTML+Erb to Haml.

The Julia Language: A fresh approach to technical computing.

sbt, the interactive build tool

A custom launcher for Minecraft that allows you to easily manage multiple installations of Minecraft at once

Dependency Manager for PHP

Documentation Generator for PHP

A super fast, highly extensible markdown parser for PHP

VisTrails is an open-source data analysis and visualization tool. It provides a comprehensive provenance infrastructure that maintains detailed history information about the steps followed and data derived in the course of an exploratory task: VisTrails m

Faker is a pure Elixir library for generating fake data.

The modern web developer’s platform

The Rust package manager

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

Audited (formerly acts_as_audited) is an ORM extension that logs all changes to your Rails models.

OmniAuth is a flexible authentication system utilizing Rack middleware.

A Ruby web framework where your Ruby runs on both server and client

Tool to gather Threat Intelligence indicators from publicly available sources

Python PDF Parser (Not actively maintained). Check out pdfminer.six.

Maintained branch of the original Dwarf Therapist for Dwarf Fortress.

Build a Jekyll blog in minutes, without touching the command line.

A system-level, binary package and environment manager running on all major operating systems and platforms.

High performance file syncing and sharing, with also Markdown WYSIWYG editing, Wiki, file label and other knowledge management features.

Ruby enVironment Manager (RVM)

Log routing for Docker container logs

A nodejs wrapper for the JIRA REST API

Official Ember Data adapter for Firebase

Semantic is a UI component framework based around useful principles from natural language.

:green_book: SheetJS Community Edition -- Spreadsheet Parser and Writer

📗 SheetJS Spreadsheet Data Toolkit -- New home https://git.sheetjs.com/SheetJS/sheetjs

Staggeringly powerful OS X desktop automation with Lua

Play Framework

The JavaScript library for modern SVG graphics.

openFrameworks is a community-developed cross platform toolkit for creative coding in C++.

MyPaint is a simple drawing and painting program that works well with Wacom-style graphics tablets.

The open-source database for the realtime web.

This project brings some of the great eclipse features to emacs developers. It is based on the eclim project, which provides eclipse features for vim.

Elixir plugin for JetBrain's IntelliJ Platform (including Rubymine)