SDL Framework (SDLFW)
SDLFW is a cross-platform framework from the powerful SDL library to create your own 2D games with the Lua programming language.
It's easy-to-use, free, open-source, and works on Windows and Linux.
FengGUI is a highly customizable, XML centric graphical user interface (GUI) application programming interface (API) based on OpenGL for Java. It addresses game and multimedia developers.