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

Zulip server and web application. Open-source team chat that helps teams stay productive and focused.

The 1.x line is frozen - features and bugfixes now happen on https://github.com/yarnpkg/berry

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

Animated sprite editor & pixel art tool (Windows, macOS, Linux)

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

Official upstream development repository for Cabal and cabal-install

Vim-fork focused on extensibility and usability

Issue tracker for Sublime Text

Generation of diagrams like flowcharts or sequence diagrams from text in a similar manner as markdown

Apache Airflow - A platform to programmatically author, schedule, and monitor workflows

Apache Airflow (Incubating)

OpenMMLab Detection Toolbox and Benchmark

Novel Coronavirus (COVID-19) Cases, provided by JHU CSSE

A multi-platform .NET UI framework

Terraform enables you to safely and predictably create, change, and improve infrastructure. It is a source-available tool that codifies APIs into declarative configuration files that can be shared amongst team members, treated as code, edited, reviewed, a

Official doxygen git repository

Magic Another Game Engine

:star: Vim for Visual Studio Code

Audio Editor

Jupyter Interactive Notebook

Distributed transactional key-value database, originally created to complement TiDB

Open Food Facts database, API server and web interface - 🐪🦋 Perl, CSS and JS coders welcome 😊 For helping in Python, see Robotoff or taxonomy-editor

A free, online learning platform to make quality education accessible for all.

SciPy library main repository

An experimental Rust compiler front-end for IDEs

Interactive UI component dev & test: React, React Native, Vue, Angular

Storybook is a frontend workshop for building UI components and pages in isolation. Made for UI development, testing, and documentation.

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

The Microsoft Build Engine (MSBuild) is the build platform for .NET and Visual Studio.

Cloud-native high-performance edge/middle/service proxy

Next generation Cosmic desktop environment

NumPy aware dynamic Python compiler using LLVM

Ceph is a distributed object, block, and file storage platform

✨ Standard library for JavaScript and Node.js. ✨

The Scala 3 compiler, also known as Dotty.

A library that provides an embeddable, persistent key-value store for fast storage.

The new Windows Terminal and the original Windows console host, all in the same place!

Rules engine for cloud security, cost optimization, and governance, DSL in yaml for policies to query, filter, and take actions on resources

Rules engine for AWS management, DSL in yaml for query, filter, and actions on resources

Get your data in RAM. Get compute close to data. Enjoy the performance.

A post-modern modal text editor.

Ruby on Rails

The official Vim repository

The Rust package manager

The React documentation website

A modern runtime for JavaScript and TypeScript.

The Ballerina Programming Language