Orx is a portable, lightweight, plugin-based, data-driven and extremely easy to use 2D-oriented game engine. As orx is data driven, it allows users to create games with a small number of lines of code and reduces drastically the development time.
The Objective-C Game Library(ObjCGL) is a set of Objective-C classes that use SDL to provide a way for programmers to implement a basic set of components into their games quickly and easily.