A game engine with an emphasis on real-time cutting-edge solutions
Zig game engine & graphics toolkit
2D JavaScript Physics Engine
A game engine powered by python and panda3d
s&box is a modern game engine, built on Valve's Source 2
Game engine supporting many 3D/2D formats and graphic effects
IsoCity: City building simulation game
YimMenu, a GTA V menu protecting against a wide ranges
Fully async, multithreaded, predictive, open source, 3.01 reach
Godot Minimal Theme
Godot game template and component-based framework
Descent 3 by Outrage Entertainment
3D game engine/framework in C, with Luajit and Python bindings now
High performance UI layout library in C
GemRB is a portable open-source implementation of the Infinity Engine
Minecraft server optimization guide
3D driving simulation based on Open Dynamics Engine
Orx: Data-Driven Game Engine
Odamex is a free, cross-platform, modern client-server Doom engine
Arianne is an engine to develop multiplayer online games like Stendhal
A real-time 3D Engine written in Ada
Chess Database and PGN viewer