Svelto ECS C# Entity Component System
High performance UI layout library in C
Orx: Portable Game Engine
Godot backend for video games based on Valor TTRPG
RTSish Game Engine
Vivid3D is a C++ IDE/3D engine, with python scripting.
A free 3D game engine to create games and realtimes scenes for Windows
A modern, cross-platform Quake game engine based on FitzQuake.
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
An isometric arcade-style game of skill, puzzles and exploration
Play Fighting Fantasy fan stories on this simple engine
A tool to easily transform Unreal Engine games into VR experiences
A Universal Mod-Loader for Games built in the Unity Engine
Portable version of the incredible Godot Game Engine
Amateur 3D Game Engine
A highly configurable board game engine.
SDL based generic 2D game engine
Haskell game engine library for roguelike dungeon crawlers
Animation Compression Library
PyCAPGE - Python Classic Adventure Point and Click Game Engine
Old-school 2D game engine
Royal Entertainment Graphics eXecution (REX)