Svelto ECS C# Entity Component System
High performance UI layout library in C
3D Game engine with editor
Animation Compression Library
A .NET ascii/ansi console engine written in C# for MonoGame and XNA
New Godot bindings for Swift
Multi Theft Auto is a game engine
2D game development library for Ruby and C++
A modern, cross-platform Quake game engine based on FitzQuake.
GemRB is a portable open-source implementation of the Infinity Engine
A tool to easily transform Unreal Engine games into VR experiences
An isometric arcade-style game of skill, puzzles and exploration
Orx: Portable Game Engine
API (C#) for simulating certain aspects of a ZX spectrum for porting.
Tools and Z80 engine for creating adventure games. (RUST)
ZDoom 2.8.1 fork focusing on modernisation, performance and stability
The world is no longer the same
SDL based generic 2D game engine
RTSish Game Engine
Ze Text Adventure game Builder : Create as you play !
A simple math library for games and computer graphics
C++ lightweight cross-platform game engine