A game engine powered by python and panda3d
Descent 3 by Outrage Entertainment
3D game engine/framework in C, with Luajit and Python bindings now
High performance UI layout library in C
2D JavaScript Physics Engine
Zig game engine & graphics toolkit
Orx: Data-Driven Game Engine
Full featured MUD server with all the trimmings.
Game engine supporting many 3D/2D formats and graphic effects
The multiplayer game engine
A game engine for console based text games
Low-Level Game Engine for Retro Platforms
Web powered cross-platform 3D, WebXR game engine
scriptable game engine with built-in support for 2D graphics and sound
Multi-platform game engine similar to old Megaman with a stage editor
A generic 2D engine for any kind of game
A 3D, fully concurrent game engine
Javascript adventure game engine