Cross-Platform C++ 2D/3D game engine
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
3D Procedural Game Engine Using OpenGL
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A game engine powered by python and panda3d
Gideros Release version
Desktop/Android/HTML5/iOS Java game development framework
A multiplatform medieval 3D MMORPG
3D space trading and combat game
Zig game engine & graphics toolkit
Stride (formerly Xenko), a free and open-source cross-platform C# game
Amateur 3D Game Engine
Free game engine for development of desktop, mobile, and web games
Flax Engine, multi-platform 3D game engine
dhewm 3 main repository
Game engine supporting many 3D/2D formats and graphic effects
Open game and rendering engine packed into a JavaScript framework
3D Game engine with editor
One framework for creating powerful cross-platform games
Multi-platform 2D and 3D game engine
Parabator 2 - Free 3d board game
A simple and easy-to-use library to enjoy videogames programming
Pycraft is an open-source, OpenGL based game made in Python
GemRB is a portable open-source implementation of the Infinity Engine