Chess program
Cinema Enters Game Console
A tool for creating Terrains.
Go 3D Game Engine
3D C++ Game Engine - yet another open source game engine
DOOM / Heretic / Hexen source port with enhanced graphics and UI
Rewrites the light engine to fix lighting performance
Java-based agent simulation platform
ZED OS the clone of Windows XP
Modern 3D engine and IDE written using C# and C++.
A 3D Snake and 2D snake
Data-oriented and data-driven game engine written in Rust
A customizable 3D platform for agent-based AI research
A 2D game engine and level editor
3D playground built on three.js and cannon.js
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
JPHP - an implementation of PHP on Java VM
Cross-platform 2D and 3D game engine
8-bit Graphical API for Java
A complete framework for Godot to create beautiful and complex AI
IGS Labs