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

Next-gen identity server (think Auth0, Okta, Firebase) with ORY-hardened authentication, MFA, FIDO2, profile management, identity schemas, social sign in, registration, account recovery, service-to-service and IoT auth. Can work as an OAuth2 / OpenID Conn

Statically sized arrays for Julia

Apache Lucene and Solr open-source search software

:cake: Cake (C# Make) is a cross platform build automation system.

Dendrite is a second-generation Matrix homeserver written in Go!

Plugin for IntelliJ IDEA that gives special support for Minecraft modding projects.

:chains: A Framework for Building High Value Public Blockchains :sparkles:

Building blocks for digital commerce

A collection of essential TypeScript types

MyPaint is a simple drawing and painting program that works well with Wacom-style graphics tablets.

Automated linting of Cascading Stylesheets

Vi/Vim emulation for Sublime Text 3

Apache Hadoop

The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.

Brings the popular ruby faker gem to Java

Ultralight, security-first service mesh for Kubernetes. Main repo for Linkerd 2.x.

PHPCI is a free and open source continuous integration tool specifically designed for PHP.

Erlang build tool that makes it easy to compile and test Erlang applications and releases.

Generate types and converters from JSON, Schema, and GraphQL

Featureful ncurses based MPD client inspired by ncmpc

Microsoft.Recognizers.Text provides recognition and resolution of numbers, units, and date/time expressed in multiple languages (CN, EN, FR, ES, PT, DE. Partial support for NL, JA, KO). Contributions are greatly welcome! Packages are available at https://

A free and open-source MMORPG server emulator written in C++

GitHub Classroom automates repository creation and access control, making it easy for teachers to distribute starter code and collect assignments on GitHub.

LLM training in simple, raw C/CUDA

OpenToonz - An open-source full-featured 2D animation creation software

Lagoon, the developer-focused application delivery platform

Kubernetes-native system managing the full lifecycle of conformant Kubernetes clusters as a service on Alicloud, AWS, Azure, GCP, OpenStack, vSphere, KubeVirt, Hetzner, EquinixMetal, MetalStack, and OnMetal with minimal TCO.

💨 Fast, Async-ready, Openapi, type hints based framework for building APIs

A command line tool to help build, run, and test web extensions

React Hooks for Data Fetching

Realtime Web Apps and Dashboards for Python and R

The open-source reactive database for app developers

Vert.x is a tool-kit for building reactive applications on the JVM

Collaborative forensic timeline analysis

LibreHealth EHR - Free Open Source Electronic Health Records

Fluent Migrations framework for .net

A high performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar

This Windows Batchscript helps setup a Mingw-w64 compiler environment for building ffmpeg and other media tools under Windows.

This is a repository for collecting global custom management extensions for the Django Framework.

SkyFireEMU is a full featured F/OSS World of Warcraft: Cataclysm emulator written in C++. || Compatible with World of Warcraft client 4.0.6a (Build:13623) || Public DB is located on forum

A terminal emulator for the 21st century.

Computer Vision and Robotics Library for AI

Facilitating Open Science

A process for automating Docker container base image updates.

a Rocket-fast SYStem for LOG processing

Lightweight, low-ceremony, framework for building HTTP based services on .Net and Mono

React Ace Component

Subscription Website Builder - subscription website in a box