Cross-Platform C++ 2D/3D game engine
Cocos simplifies game creation and distribution with Cocos Creator
Cross-platform 2D and 3D game engine with modular architecture
Free game engine for development of desktop, mobile, and web games
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Multi-platform 2D and 3D game engine
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Orx: Portable Game Engine
A free 3D game engine to create games and realtimes scenes for Windows
2D game development library for Ruby and C++
Vivid is a modern C++ 3D engine using OpenGL4+
2D Game Engine
2D Game Engine with Lua Scripting made on top of SFML
A cross platform Lua based game engine
A 2D game engine and level editor
Cross-platform 2D and 3D game engine
A cross-platform 2D game engine
Real-time RPG for PC/tablet/phone; multiple quests and random dungeons
scriptable game engine with built-in support for 2D graphics and sound
The Atomic Game Engine is a multi-platform 2D and 3D engine
Open-source, cross-platform, C++ game engine for creating 2D/3D games
2D game engine for traditional platform games