Multi Theft Auto is a game engine
Self-hosted game stream host for Moonlight
A certain block game
A multi core friendly rigid body physics and collision detection lib
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Doom-based AI research platform for reinforcement learning
An open source flight dynamics & control software library
Multi-platform 2D and 3D game engine
Open source simulation game based on Transport Tycoon Deluxe
Flax Engine, multi-platform 3D game engine
Flexible level editor
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Roblox Anti-AFK. The program for AntiAFK and Multi-Instance in Roblox.
RTS game with the theme of Strategy by Design
FlightGear Flight Simulator: free open-source multiplatform flight sim
Cooperative multiplayer graphical RPG and adventure game
Let it snow on your desktop
Chess Database and PGN viewer
Android, UIQ 3.0, Series 60 Edition 5 open-source software
a wow model explorer
A free Chess program for Windows with a large set of features
Zoomable user interface (ZUI) with file manager, file viewers and more