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

Decorator-based property validation for classes.

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

Collection of extensions for OpenTelemetry-Go.

Rayon: A data parallelism library for Rust

A place to submit conda recipes before they become fully fledged conda-forge feedstocks

Which is the fastest web framework?

RPG Maker 2000/2003 and EasyRPG games interpreter

Mirror of Apache RocketMQ

React Hooks for Data Fetching

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.

An experimental peer-to-peer Web browser

Collaborative forensic timeline analysis

Rust library that's all about cooking up terminal user interfaces (TUIs)

Transparent proxy server that works as a poor man's VPN. Forwards over ssh. Doesn't require admin. Works with Linux and MacOS. Supports DNS tunneling.

Spring Data Commons. Interfaces and code shared between the various datastore specific implementations.

An open source re-implementation of RollerCoaster Tycoon 2 🎢

Learn how to design large-scale systems. Prep for the system design interview. Includes Anki flashcards.

An Open Source YouTube app for privacy

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

Generate types and converters from JSON, Schema, and GraphQL

Care is a Digital Public Good enabling TeleICU & Decentralised Administration of Healthcare Capacity across States.

a very good whiteboard

A safe, concurrent, practical language.

Create React apps with no build configuration.

Code documentation written as code! How novel and totally my idea!

An open source time-series database for fast ingest and SQL queries

Next Generation Shell (NGS)

Fast, easy and reliable testing for anything that runs in a browser.

A new bootable USB solution.

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

investpy  — is  a Python library for historical data extraction from the spanish stock market

A Java serialization/deserialization library to convert Java Objects into JSON and back

A community developed python package for plasma physics in the early stages of development.

A SwiftUI Mastodon client

Next-gen browser and mobile automation test framework for Node.js

A Crystal database wrapper for reading, writing, and migrating Postgres databases.

Main repository for the servant libraries — DSL for describing, serving, querying, mocking, documenting web applications and more!

Provides PowerShell language and debugging support for Visual Studio Code

HDF5 for Python -- The h5py package is a Pythonic interface to the HDF5 binary data format.

AlaSQL.js - JavaScript SQL database for browser and Node.js. Handles both traditional relational tables and nested JSON data (NoSQL). Export, store, and import data from localStorage, IndexedDB, or Excel.

High-Performance server for NATS, the cloud native messaging system.

Vim-fork focused on extensibility and usability

A powerful Flutter chart library, currently supporting Line Chart, Bar Chart, Pie Chart and Scatter Chart.

Ruby enVironment Manager (RVM)

Bears for coala

Your self-hosted, globally interconnected microblogging community

Backstage is an open platform for building developer portals