Multi Theft Auto is a game engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
Flax Engine, multi-platform 3D game engine
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Multi-platform 2D and 3D game engine
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Self-hosted game stream host for Moonlight
Voxel game-creation platform with easy modding and game creation
The ioquake3 community effort to continue supporting/developing id's
Repository for the Goonstation branch of SS13
A high-performance, industry-standard 2D physics engine built on Box2D
LayaAir is an open-source 2D/3D engine
The HTML5 Creation Engine
3D and 2D game engine written in Rust
A 2D rigid body physics engine for the web
A retro game engine for Python
ThinkPHP Framework
A multi core friendly rigid body physics and collision detection lib
An open source flight dynamics & control software library
Doom-based AI research platform for reinforcement learning
Game engine supporting many 3D/2D formats and graphic effects
Home theater software and entertainment hub for digital media
2D JavaScript Physics Engine
lua dev plugin for unreal engine 4 or 5
High performance UI layout library in C