Cocos simplifies game creation and distribution with Cocos Creator
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Multi-platform 2D and 3D game engine
A dead simple 2D game engine for Go
Free, cross-platform 2D game engine powered by Haxe and OpenFL
Cross-platform game engine in Rust
Orx: Data-Driven Game Engine
Cross-platform 2D game engine (+ full OpenGL, +full OpenGL ES )
2D Game Engine
Cross-platform 2D and 3D game engine
Real-time RPG for PC/tablet/phone; multiple quests and random dungeons
The Atomic Game Engine is a multi-platform 2D and 3D engine
Modern AS3 Game Engine
Open-source, cross-platform, C++ game engine for creating 2D/3D games
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
2D physics engine for games
cross-platform 2d game engine
Cross-platform 2D game engine