Open QR Code is an open-source, cross-platform app
Real-time physically based rendering engine for Android, iOS, and more
Game engine to build text adventures.
GemRB is a portable open-source implementation of the Infinity Engine
Orx: Portable Game Engine
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Android apps.
2D Game Engine
A cross platform Lua based game engine
Cross-platform 2D and 3D game engine
Real-time RPG for PC/tablet/phone; multiple quests and random dungeons
RelaxChess, chess game that makes no search futher needed for a wow
Cocos2d for iOS and OS X, built using Objective-C
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
2D physics engine for games
C-Lesh is a game programming language for 2D games.
NinYawg Adventure
cross-platform 2d game engine
Cross-platform 2D game engine