Open source. Open possibilities.

Tokamak is a C# engine designed for creating games and virtual worlds, providing a modular set of building blocks for application development.

raylib is a simple, easy-to-use C library for videogame programming, ideal for prototyping, education, and graphical applications.

Pyxel is a retro game engine for Python with simple, console-inspired limits such as 16 colors and four sound channels. It is MIT-licensed, free to use, and aimed at making pixel-art-style game creation approachable.

OpenRCT2 is an open-source re-implementation of RollerCoaster Tycoon 2, the amusement-park construction and management game. It adds modern platform support, an improved interface, better guest and staff AI, more editing tools, raised limits, cooperative multiplayer and some mechanics restored from the original RollerCoaster Tycoon.

Alacritty is a fast, cross-platform OpenGL terminal emulator with sensible defaults, extensive TOML configuration, and GPU-accelerated performance on BSD, Linux, macOS, and Windows.

RPCS3 is a free and open-source PlayStation 3 emulator and debugger written in C++, supporting Windows, Linux, macOS, and FreeBSD. It enables PS3 game playback on modern hardware and provides debugging capabilities for emulation development.

A simple framework for developing interactive applications, simulations, and video games, providing core engine functionality without a dedicated editor.

MangoHud is a Vulkan and OpenGL overlay for Linux that shows FPS, frametimes, CPU/GPU load, temperatures and more while gaming, with a highly configurable HUD, FPS limiting, logging and plotting tools.

kitty is a fast, feature-rich, cross-platform, GPU-accelerated terminal emulator for users who work primarily in the terminal.

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.

OpenSCAD is a free, script-based solid 3D CAD modeller designed for creating machine parts and technical objects through a 3D-compiler approach.

openFrameworks is a C++ toolkit for creative coding, supporting cross-platform development for Windows, Linux, macOS, iOS, tvOS, and Emscripten.

A private, offline AI roleplay application for Windows that generates text-based stories and inline images locally.