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

Confluent's Apache Kafka .NET client

AI-Powered Photos App for the Decentralized Web 🌈💎✨

Graphical Java application for managing BibTeX and BibLaTeX (.bib) databases

Pygments is a generic syntax highlighter written in Python

Mautic: Open Source Marketing Automation Software.

GNU Radio – the Free and Open Software Radio Ecosystem

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

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

Data Apps & Dashboards for Python. No JavaScript Required.

A Gateway built on Spring Framework and Spring Boot providing routing and more.

A SwiftUI Mastodon client

AngularJS - HTML enhanced for web apps!

Modern CSS framework based on Flexbox

Open-source software for volunteer computing and grid computing.

Backstage is an open platform for building developer portals

Cross-platform, customizable ML solutions for live and streaming media.

Official docs, website, and handbook for PostHog.

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

Status, process, and documents for ECMA-262

A cross-platform, linkable library implementation of Git that you can use in your application.

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

Compass is no longer actively maintained.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

Voyager - The Missing Laravel Admin

Reactive Microservices for the JVM

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

A linting tool for the web

💡 A hinting engine for the web

The App Framework for Startups

Command-line JSON processor

nose is nicer testing for python

C++ websocket client/server library

The Ruby Programming Language

A Chaos Engineering Platform for Kubernetes.

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

Build amazing native and progressive web apps with open web technologies. One app running on everything 🎉

Data validation using Python type hints

Multi functional app to find duplicates, empty folders, similar images etc.

A powerful cross-platform UI toolkit for building native-quality iOS, Android, and Progressive Web Apps with HTML, CSS, and JavaScript.

SpotBugs is FindBugs' successor. A tool for static analysis to look for bugs in Java code.

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

A server software for Minecraft: Bedrock Edition in PHP

The user-friendly command line shell.

Play Framework

Play Framework

Metasploit Framework

A systems integration framework, built to bring the benefits of configuration management to your entire infrastructure.

Chef Infra, a powerful automation platform that transforms infrastructure into code automating how infrastructure is configured, deployed and managed across any environment, at any scale

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

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.

Deduplicating archiver with compression and authenticated encryption.