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.

Nix Packages collection

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

The Servo Browser Engine

A glossy Matrix collaboration client for the web.

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.

The Servo Browser Engine

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

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

The JavaScript and API powered WordPress.com

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

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.

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

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

Odoo. Open Source Apps To Grow Your Business.

An open-source distributed JSON document database with a pleasant and powerful query language.

a package manager for javascript

One framework. Mobile & desktop.

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

Optional static typing for Python 2 and 3 (PEP484)

Issue tracker for Backdrop core.

Traccar GPS Tracking System

Tensors and Dynamic neural networks in Python with strong GPU acceleration

🚀 Yet another project to get beginners contributing to open source 🔰

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.

Ruby on Rails

Sentry is a cross-platform crash reporting and aggregation platform.

:bar_chart: Kibana analytics and search dashboard for Elasticsearch

Ballerina is a compiled, transactional, statically and strongly typed programming language with textual and graphical syntaxes.

Nim is a compiled, garbage-collected systems programming language with a design that focuses on efficiency, expressiveness, and elegance (in that order of priority).

JupyterLab computational environment.

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

The Crystal Programming Language

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

Open Source, Distributed, RESTful Search Engine

Open Source ERP built for the web

Vim-fork focused on extensibility and usability

Magic Another Game Engine

ClickHouse is a free analytic DBMS for big data.

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

SuiteCRM - Open source CRM for the world