Stride (formerly Xenko), a free and open-source cross-platform C# game
Ct.js is a desktop game engine that makes learning programming fun
Powerful, mature open-source cross-platform game engine for Python
Multi Theft Auto is a game engine
Solar2D Game Engine main repository (ex Corona SDK)
A game framework written with osu! in mind.
The flexible game engine
Svelto ECS C# Entity Component System
Cross-platform 2D game engine focused on ultimate productivity
The game engine for everyone
A pure Go game engine
3D Procedural Game Engine Using OpenGL
Cross-platform 2D and 3D game engine with modular architecture
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
Descent 3 by Outrage Entertainment
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
dhewm 3 main repository
The ioquake3 community effort to continue supporting/developing id's
3D Game engine with editor
An easy to use 2D HTML5 game engine written in TypeScript
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Free game engine for development of desktop, mobile, and web games
New Godot bindings for Swift
High performance UI layout library in C
Multi-platform 2D and 3D game engine