Multi Theft Auto is a game engine
Solar2D Game Engine main repository (ex Corona SDK)
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
dhewm 3 main repository
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
Flax Engine, multi-platform 3D game engine
Free, open source game engine online
3D Procedural Game Engine Using OpenGL
The Tiny JavaScript Game Engine That Can!
A Flutter based game engine
Ct.js is a desktop game engine that makes learning programming fun
Svelto ECS C# Entity Component System
An easy to use 2D HTML5 game engine written in TypeScript
New Godot bindings for Swift
A pure Go game engine
Urho3D Game engine
The flexible game engine
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
Haskell game engine library for roguelike dungeon crawlers
A game framework written with osu! in mind.
A cross-platform, open-source, pure C game engine for mobile game
Entitas is a super fast Entity Component System (ECS) Framework
Engo is an open-source 2D game engine written in Go
Retro game engine for creating games like it's 1997
Game engine supporting many 3D/2D formats and graphic effects