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

A lightweight, fast and extensible game server for Minecraft

A lightweight, fast and extensible game server for Minecraft

Java DSL for easy testing of REST services

Staticcheck - The advanced Go linter

Connect suppliers, distributors and consumers to trade local produce.

Single-cell analysis in Python. Scales to >1M cells.

Open-source keyboard firmware for Atmel AVR and Arm USB families

Build amazing native and progressive web apps with open web technologies. One app running on everything 🎉

A powerful cross-platform UI toolkit for building native-quality iOS, Android, and Progressive Web Apps with HTML, CSS, and JavaScript.

Postgresql JDBC Driver

awesome window manager

An entity framework for Go

JavaScript 3D library.

Catch CSS curve balls.

Action for checking out a repo

A code-searching tool similar to ack, but faster.

The Racket repository

The Racket repository

a collaborative knowledge-exchange platform in Rails; we welcome first-time contributors! :balloon:

Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs that preserve your privacy. Cookies are separated by container, allowing you to use the web with multiple identities or accounts simultaneously.

:zap: A Fast, Extensible Progress Bar for Python and CLI

:leaves: JavaScript library for mobile-friendly interactive maps

Java libraries for writing microservices

Telegram-iOS

🚀 10x easier, 🚀 140x lower storage cost, 🚀 high performance, 🚀 petabyte scale - Elasticsearch/Splunk/Datadog alternative for 🚀 (logs, metrics, traces, RUM, Error tracking, Session replay).

A Git-based CMS for Static Site Generators

Data Apps & Dashboards for Python. No JavaScript Required.

Cross-platform, customizable ML solutions for live and streaming media.

Support for adding OAuth1(a) and OAuth2 features (consumer and provider) for Spring web applications.

SeaweedFS is a fast distributed storage system for blobs, objects, files, and data lake, for billions of files! Blob store has O(1) disk seek, cloud tiering. Filer supports Cloud Drive, cross-DC active-active replication, Kubernetes, POSIX FUSE mount, S3

A virtual machine for executing programs written in Hack.

:rocket:  A fully-featured, production ready caching GraphQL client for every UI framework and GraphQL server.

Python packaging and dependency management made easy

GNU Radio – the Free and Open Software Radio Ecosystem

Ruby enVironment Manager (RVM)

Ruby enVironment Manager (RVM)

The Free Software Media System

A scalable, distributed Time Series Database.

Make your first PR! ~ A beginner-friendly repository. Add your profile, a blog, or any program under any language (it can be anything from a hello-world program to a complex data structure algorithm) or update the existing one. Just make sure to add the f

Automatically generates Rust FFI bindings to C (and some C++) libraries.

Official haskell ide support via language server (LSP). Successor of ghcide & haskell-ide-engine.

Distributed SQL transaction & query engine for data sharding, scaling, encryption, and more - on any database.

A declarative JavaScript library for application development using cloud services.

Yii 2: The Fast, Secure and Professional PHP Framework

Widelands is a free, open source real-time strategy game with singleplayer campaigns and a multiplayer mode. The game was inspired by Settlers II™ (© Bluebyte) but has significantly more variety and depth to it.

Python package for earth-observing satellite data processing

Connect, secure, control, and observe services.

👽 API request builder - Helps you create your requests faster, saving you precious time on your development https://postwoman.io

👽 Open source API development ecosystem - https://hoppscotch.io