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

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

Production-Grade Container Scheduling and Management

Adds static typing to JavaScript to improve developer productivity and code quality.

Nix Packages collection

The Servo Browser Engine

Flexible and powerful data analysis / manipulation library for Python, providing labeled data structures similar to R data.frame objects, statistical functions, and much more

scikit-learn: machine learning in Python

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.

Odoo. Open Source Apps To Grow Your Business.

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

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

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

Jupyter Interactive Notebook

OsmAnd

Nix, the purely functional package manager

The tool for beautiful monitoring and metric analytics & dashboards for Graphite, InfluxDB & Prometheus & More

Numpy main repository

unix-like reverse engineering framework and commandline tools

The Go programming language

Emscripten: An LLVM-to-JavaScript Compiler

Home of the Joomla! Content Management System

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

Scalable datastore for metrics, events, and real-time analytics

A place to report bugs on websites.

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

The Crystal Programming Language

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

Material Design components for Angular

Build cross platform desktop apps with JavaScript, HTML, and CSS

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