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

A fast JSON parser/generator for C++ with both SAX/DOM style API

The Wikimedia Commons Android app allows users to upload pictures from their Android phone/tablet to Wikimedia Commons

Personal CRM. Remember everything about your friends, family and business relationships.

Collection of handy online tools for developers, with great UX.

The Prometheus monitoring system and time series database.

🐠 Babel is a compiler for writing next generation JavaScript.

🎧 Open source music client! Available for both desktop & mobile!

SVG icons for popular brands

Apache Maven core

BizHawk is a multi-system emulator written in C#. BizHawk provides nice features for casual gamers such as full screen, and joypad support in addition to full rerecording and debugging tools for all system cores.

The FRRouting Protocol Suite

Make Your Company Data Driven. Connect to any data source, easily visualize, dashboard and share your data.

The Serenity Operating System 🐞

One framework for creating powerful cross-platform games.

Cloud-native search engine for observability. An open-source alternative to Datadog, Elasticsearch, Loki, and Tempo.

Build like a team of hundreds_

wallabag is a self hostable application for saving web pages: Save and classify articles. Read them later. Freely.

Vagrant is a tool for building and distributing development environments.

Vagrant is a tool for building and distributing development environments.

The Markdown-based note-taking app that doesn't suck.

Making Docker and Kubernetes management easy.

music library manager and MusicBrainz tagger

👽 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

3D plotting and mesh analysis through a streamlined interface for the Visualization Toolkit (VTK)

Google core libraries for Java

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

Global Extensible Open Power Manager

:speech_balloon: A community-driven python bot that aims to be as simple as possible to serve humans with their everyday tasks

A query builder for PostgreSQL, MySQL and SQLite3, designed to be flexible, portable, and fun to use.

Modin: Scale your Pandas workflows by changing a single line of code

A fancy self-hosted monitoring tool

Bitcoin Core integration/staging tree

Federated (ActivityPub) video streaming platform using P2P (BitTorrent) directly in the web browser with WebTorrent and Angular.

Theano is a Python library that allows you to define, optimize, and evaluate mathematical expressions involving multi-dimensional arrays efficiently. It can use GPUs and perform efficient symbolic differentiation.

The repository for high quality TypeScript type definitions.

lichess.org mobile application

MODX Revolution - Content Management Framework

Bears for coala

Create agents that monitor and act on your behalf. Your agents are standing by!

Create agents that monitor and act on your behalf. Your agents are standing by!

OpenTelemetry Collector

Next generation frontend tooling. It's fast!

Quasar Framework - Build high-performance VueJS user interfaces in record time

A scalable, distributed, collaborative, document-graph database, for the realtime web

Apache CloudStack is an opensource Infrastructure as a Service (IaaS) cloud computing platform

E2E test framework for Angular apps

Truly independent web browser

Self-hosted photo and video backup solution directly from your mobile phone.