Stride (formerly Xenko), a free and open-source cross-platform C# game
Solar2D Game Engine main repository (ex Corona SDK)
Multi Theft Auto is a game engine
The flexible game engine
Descent 3 by Outrage Entertainment
A pure Go game engine
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
The ioquake3 community effort to continue supporting/developing id's
Free game engine for development of desktop, mobile, and web games
dhewm 3 main repository
High performance UI layout library in C
An easy to use 2D HTML5 game engine written in TypeScript
3D Procedural Game Engine Using OpenGL
New Godot bindings for Swift
Svelto ECS C# Entity Component System
Multi-platform 2D and 3D game engine
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
Recreation of the classic Grand Theft Auto III game executable
3D Game engine with editor
A game framework written with osu! in mind.
API (C#) for simulating certain aspects of a ZX spectrum for porting.
Orx: Data-Driven Game Engine
Vivid3D is an open-source 3D engine with powerful 2D UI.
Modified source engine (2017) developed by valve and leaked in 2020
Urho3D Game engine