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

PowerMock is a Java framework that allows you to unit test code normally regarded as untestable.

Python package for earth-observing satellite data processing

Ivy - a generic completion frontend for Emacs, Swiper - isearch with an overview, and more. Oh, man!

An open-source C++ library developed and used at Facebook.

Action for checking out a repo

Reactive Microservices for the JVM

JSHint is a tool that helps to detect errors and potential problems in your JavaScript code

Canonical actor model implementation for .NET with local + distributed actors in C# and F#.

The user-friendly command line shell.

nose is nicer testing for python

An operating function

Dapper - a simple object mapper for .Net

:video_game: GDevelop is an open-source, cross-platform game engine designed to be used by everyone.

Building blocks for digital commerce

Background Music, a macOS audio utility: automatically pause your music, set individual apps' volumes and record system audio.

Realm is a mobile database: a replacement for Core Data & SQLite

Web based translation tool with tight version control integration.

Official vibe.d development

The Cyber Swiss Army Knife - a web app for encryption, encoding, compression and data analysis

A privacy-aware, distributed, open source social network.

Status, process, and documents for ECMA-262

A server software for Minecraft: Bedrock Edition in PHP

The OpenTelemetry .NET Client

:satellite: :cloud: :notes:Airsonic, a Free and Open Source community driven media server (fork of Subsonic and Libresonic)

C++ websocket client/server library

Slick (Scala Language Integrated Connection Kit) is a modern database query and access library for Scala

A linting tool for the web

💡 A hinting engine for the web

[mirror] A Tour of Go

Telegram-iOS

Mod manager for various PC games. Discord Server: https://discord.gg/cYwdcxj if you would like to be more involved

Shōgun

NOVA opeN sOurce Video plAyer: main repository to build them all

Command-line JSON processor

Voyager - The Missing Laravel Admin

Apache Traffic Server™ is a fast, scalable and extensible HTTP/1.1 and HTTP/2 compliant caching proxy server.

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

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.

Warzone 2100 - a free and open source real time strategy game.

A modern file manager that pushes the boundaries of the platform.

💻 A fully functional local AWS cloud stack. Develop and test your cloud & Serverless apps offline

Official docs, website, and handbook for PostHog.

The HTML-first framework. Instant apps of any size with ~ 1kb JS

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

Annotation processor to create immutable objects and builders. Feels like Guava's immutable collections but for regular value objects. JSON, Jackson, Gson, JAX-RS integrations included

ClosedXML makes it easier for developers to create Excel 2007+ (.xlsx, .xlsm, etc) files. It provides a nice object oriented way to manipulate the files (similar to VBA) without dealing with the hassles of XML Documents. It can be used by any .NET languag

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