Xash3D FWGS engine
Voxel game-creation platform with easy modding and game creation
A game engine powered by python and panda3d
The game engine for everyone
A game engine with an emphasis on real-time cutting-edge solutions
Voxel game engine in C++ with OpenGL
Cross-platform 2D and 3D game engine with modular architecture
Multi Theft Auto is a game engine
JavaScript-based game engine designed to empower developers
Free game engine for development of desktop, mobile, and web games
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
A modular Common Lisp game engine
Stride (formerly Xenko), a free and open-source cross-platform C# game
3D Procedural Game Engine Using OpenGL
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A 2D rigid body physics engine for the web
A fresh & lightweight javascript game engine
A .NET ascii/ansi console engine written in C# for MonoGame and XNA
A Flutter based game engine
Ct.js is a desktop game engine that makes learning programming fun
A high-performance, industry-standard 2D physics engine built on Box2D
Kotlin extensions for the libGDX game framework
An OpenGL RTS game engine written in C
2D JavaScript Physics Engine