The game engine for everyone
Open-source engine for Heroes of Might and Magic III
Powerful, mature open-source cross-platform game engine for Python
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
The Tiny JavaScript Game Engine That Can!
Animation Compression Library
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
An easy to use 2D HTML5 game engine written in TypeScript
Svelto ECS C# Entity Component System
Ct.js is a desktop game engine that makes learning programming fun
The flexible game engine
Eva.js is a front-end game engine for creating interactive projects
Entitas is a super fast Entity Component System (ECS) Framework
Open source reimplementation of GTA San Andreas game engine in Unity
Orx: Portable Game Engine
SDL based generic 2D game engine
3D Scene Builder
Javascript library for making tile based games
Vivid is a modern C++ 3D engine using OpenGL4+
RTSish Game Engine
3D Game engine with editor
A fast, scalable, distributed game server engine/framework for C++
A project to create a blazingly fast Swift game engine
A 2d physics game engine for JavaFX