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

A SwiftUI Mastodon client

Gitpod automates the provisioning of ready-to-code development environments.

The Python Package Index

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.

🐺 Turn Based Strategy Game. Master your beasts!

Modern CSS framework based on Flexbox

👽 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

Mumble is an Open Source, low-latency, high quality voice chat software

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

Simple, Pythonic remote execution and deployment.

GNU Radio – the Free and Open Software Radio Ecosystem

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

Pygments is a generic syntax highlighter written in Python

The world’s fastest framework for building websites.

Open-source software for volunteer computing and grid computing.

Confluent's Apache Kafka .NET client

The official repo for the design of the C# programming language

AngularJS - HTML enhanced for web apps!

Status, process, and documents for ECMA-262

Metasploit Framework

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

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

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

Build and share delightful machine learning apps, all in Python. 🌟 Star to support our work!

C++ websocket client/server library

A linting tool for the web

💡 A hinting engine for the web

Compass is no longer actively maintained. Compass is a Stylesheet Authoring Environment that makes your website design simpler to implement and easier to maintain.

Command-line JSON processor

A Chaos Engineering Platform for Kubernetes.

Play Framework

Play Framework

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

Voyager - The Missing Laravel Admin

Reactive Microservices for the JVM

Free and source-available fair-code licensed workflow automation tool. Easily automate tasks across different services.

nose is nicer testing for python

Joplin - the secure note taking and to-do app with synchronisation capabilities for Windows, macOS, Linux, Android and iOS.

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

The App Framework for Startups

📄 Create PDF files using React

Javascript Canvas Library, SVG-to-Canvas (& canvas-to-SVG) Parser

The official repository for the AiiDA code

Most popular Mocking framework for unit tests written in Java

Data validation using Python type hints

The user-friendly command line shell.

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.

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