Open source. Open possibilities.

A framework for jumpstarting production-ready Django projects quickly using Cookiecutter.

OpenRA is a free/libre real-time strategy game engine for early Westwood classics like Command & Conquer: Red Alert, Tiberian Dawn and Dune 2000. It is written in C# with SDL/OpenGL, runs on Windows, Linux, BSD and macOS, and offers mapping, modding and dedicated server tools.

A Clean Architecture solution template for ASP.NET Core, distributed as a dotnet CLI template. It provides layered Core, Use Cases, Infrastructure and Web projects with tests, plus full and minimal variants.

A popular open-source guide to 33 essential JavaScript concepts, with clear explanations, code examples, and curated resources. It has grown beyond the original list and is available in 40+ translations.

Detox is a gray box end-to-end testing framework for mobile apps, supporting React Native on Android and iOS. It automates user interactions, reduces flakiness, and integrates with CI/CD pipelines.

Git is a fast, scalable, distributed revision control system providing a rich command set for high-level operations and internal access.

Readme Typing SVG generates animated SVG text that appears to type and delete, customizable via URL parameters for GitHub profiles, READMEs, and websites.

A functional and stateful Go framework for building terminal user interfaces (TUIs) based on The Elm Architecture.

openage is a volunteer project building a free engine clone of the Genie Engine used by Age of Empires and AoE II. It uses original assets (not shipped), and gameplay is currently non-functional while the simulation is reimplemented. C++20, Python, Qt6, OpenGL, nyan modding format.

NocoDB is a free, self-hostable open-source alternative to Airtable that provides a no-code spreadsheet interface for databases.

Educational collection of algorithms implemented in Java, intended for learning purposes. Includes a full directory of applications, contribution guidelines, and support for running/editing in Gitpod.

An open-source developer platform for building native cross-platform .NET applications for Web, Desktop, Mobile, and Embedded systems from a single C#/XAML codebase.

Wagtail is an open source content management system built on Django, offering a fast authoring interface, flexible StreamField content, a content API for headless sites, and integrated search.

Original Apollo 11 Guidance Computer (AGC) source code for the Command Module (Comanche055) and Lunar Module (Luminary099), digitized from MIT Museum hardcopy scans.

An asynchronous Python client for Stockholm's Open Data Platform API. It currently retrieves disabled-parking locations (about 2045) with address, district, coordinates and validity dates, requires an API key, and is structured so other datasets from the same platform can be added.

Marked is a fast, lightweight Markdown parser and compiler that works in browsers, on Node.js servers, and via CLI. It supports all standard Markdown features, custom extensions, and is easily adaptable for different use cases.

A comprehensive, community-curated collection of free learning resources for programming, including books, courses, and interactive tutorials in numerous languages.

Nuxt is a free, open-source full-stack framework for building type-safe, performant Vue.js applications with server-side rendering, static generation, automatic routing, and 300+ extensible modules.

A fast, community-driven file search and application launcher for Windows that enhances workflow through a wide array of plugins and system integrations.

Fastify is a fast, low-overhead web framework for Node.js with a powerful plugin architecture, JSON Schema-based validation and serialization, and built-in Pino logging. It is extensible via hooks, plugins and decorators, and is maintained as an OpenJS Foundation project.