A game engine powered by python and panda3d
Descent 3 by Outrage Entertainment
High performance UI layout library in C
3D game engine/framework in C, with Luajit and Python bindings now
A game engine with an emphasis on real-time cutting-edge solutions
2D JavaScript Physics Engine
Zig game engine & graphics toolkit
Orx: Data-Driven Game Engine
GemRB is a portable open-source implementation of the Infinity Engine
Game engine supporting many 3D/2D formats and graphic effects
The multiplayer game engine
A Tile-based Game Engine written in C# mimicing retro consoles.
Amazon Lumberyard is a free AAA game engine
A cross platform Lua based game engine
Low-Level Game Engine for Retro Platforms
Web powered cross-platform 3D, WebXR game engine
Portable game engine with main focus on point-and-click adventures
scriptable game engine with built-in support for 2D graphics and sound
Multi-platform game engine similar to old Megaman with a stage editor
An advanced flexible game engine for Java.