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

The .NET Compiler Platform ("Roslyn") provides open-source C# and Visual Basic compilers with rich code analysis APIs.

A safe, concurrent, practical language.

The https://freeCodeCamp.org open source codebase and curriculum. Learn to code and help nonprofits.

Ansible is a radically simple IT automation platform that makes your applications and systems easier to deploy. Avoid writing scripts or custom code to deploy and update your applications— automate in a language that approaches plain English, using SSH, w

An open source code editor for the web, written in JavaScript, HTML and CSS.

Notepad++ official repository

Production-Grade Container Scheduling and Management

This repo contains the .NET Core runtime, called CoreCLR, and the base library, called System.Private.Corelib (or mscorlib). It includes the garbage collector, JIT compiler, base .NET data types and many low-level classes. We welcome contributions.

The Servo Browser Engine

Tensors and Dynamic neural networks in Python with strong GPU acceleration

Moby Project - a collaborative project for the container ecosystem to assemble container-based systems

A curated list of amazingly awesome Elixir and Erlang libraries, resources and shiny things. Updates:

a fast, scalable, multi-language and extensible build system

The Go programming language

a package manager for javascript

Entity Framework Core is a lightweight and extensible version of the popular Entity Framework data access technology

One framework. Mobile & desktop.

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

Yoast SEO for WordPress

Open Source Computer Vision Library

:house_with_garden: Open-source home automation platform running on Python 3

Liberating Web Analytics. Star us on Github? +1. Matomo is the leading open alternative to Google Analytics that gives you full control over your data. Matomo lets you easily collect data from websites, apps & the IoT and visualise this data and extract i

:cloud: ownCloud web server core (Files, DAV, etc.)

matplotlib: plotting with Python

A computer algebra system written in pure Python

The official bug tracker for the Scala programming language.

Godot Engine – Multi-platform 2D and 3D game engine

Dolibarr ERP CRM is a modern software package to manage your company or foundation activity (contacts, suppliers, invoices, orders, stocks, agenda, ...).It's opensource software (wrote with PHP language) designed for small and medium companies, foundation

Deep Learning for humans

OsmAnd

Material Design components for Angular

Home of the Joomla! Content Management System

The official repo for the design of the C# programming language

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

Certbot is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server. It can also act as a client for any other CA that uses the ACME protocol.

Odoo. Open Source Apps To Grow Your Business.

Open Source, Distributed, RESTful Search Engine

BOSH release and development workspace for Concourse

Magic Another Game Engine