Cocos simplifies game creation and distribution with Cocos Creator
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Multi-platform 2D and 3D game engine
An iOS & tvOS Frontend for Multiple Emulators
Open source library for creative expression on the web, desktop, etc.
Desktop/Android/HTML5/iOS Java game development framework
One framework for creating powerful cross-platform games
Cross-platform game engine in Rust
GemRB is a portable open-source implementation of the Infinity Engine
3D modeler, 3D game maker, 3D demo maker
PyMancala: A Python API for the Mancala game
The AWS GameKit Plugin for Unreal
Cinema Enters Game Console
ZED OS the clone of Windows XP
Cross-platform 2D and 3D game engine
Character animation system for games and simulations.
The Atomic Game Engine is a multi-platform 2D and 3D engine
Open-source, cross-platform, C++ game engine for creating 2D/3D games
3D .NET engine for Windows, Linux, Mac
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Egret is a brand new open mobile game and application engine
A cross-platform OpenGL based lightweight scenegraph library