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

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

Cataclysm - Dark Days Ahead. A turn-based survival game set in a post-apocalyptic world.

Your self-hosted, globally interconnected microblogging community

This repo contains the .NET Core foundational libraries, called CoreFX. It includes classes for collections, file systems, console, XML, async and many others. We welcome contributions.

Open Source ERP built for the web

Yoast SEO for WordPress

OsmAnd

One framework. Mobile & desktop.

Material Design components for Angular

Next generation Brave browser for macOS, Windows, Linux, and eventually Android

The Python programming language

unix-like reverse engineering framework and commandline tools

A computer algebra system written in pure Python

Synapse: Matrix reference homeserver

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

All Submissions you make to Magento Inc. (“Magento") through GitHub are subject to the following terms and conditions: (1) You grant Magento a perpetual, worldwide, non-exclusive, no charge, royalty free, irrevocable license under your applicable copyrigh

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

Nix, the purely functional package manager

Repository for the Astropy core package

RIOT - The friendly OS for IoT

Printing since 1440. Development hub for the editor focus in core. Plugin is available from the official WordPress repository.

Gitea: Git with a cup of tea

SuiteCRM - Open source CRM for the world

The Go programming language

OS-agnostic, system-level binary package manager and ecosystem

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

Yii 2: The Fast, Secure and Professional PHP Framework

Terraform AWS provider

Zcash - Internet Money

K-9 Mail – Advanced Email for Android 📧

Command-line program to download videos from YouTube.com and other video sites

Spring Framework

A PSP emulator for Android, Windows, Mac and Linux, written in C++. Want to contribute? Join us in #ppsspp on freenode (IRC) or just send pull requests / issues. For discussion use the forums on ppsspp.org.

The Symfony PHP framework

Bitcoin Core integration/staging tree

Vim-fork focused on extensibility and usability

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.

:bar_chart: Kibana analytics and search dashboard for Elasticsearch

BOSH release and development workspace for Concourse

JavaScript 3D library.

The host/runtime that powers Azure Functions

Terraform is a tool for building, changing, and combining infrastructure safely and efficiently.

A bunch of lints to catch common mistakes and improve your Rust code

A bunch of lints to catch common mistakes and improve your Rust code

Redis is an in-memory database that persists on disk. The data model is key-value, but many different kind of values are supported: Strings, Lists, Sets, Sorted Sets, Hashes, HyperLogLogs, Bitmaps.

matplotlib: plotting with Python

Caffe: a fast open framework for deep learning.

☁️ Nextcloud server, a safe home for all your data

Google core libraries for Java

A browser extension that encrypts your communications with many websites that offer HTTPS but still allow unencrypted connections.