SPECTRE: the Simple, Progressive, Easily Customizable, Tricked-out RPG Engine! SPECTRE is a collection of easily implemented classes which are intended to eventually form the basis for a complete 2D game engine.
OpenMind is a scene graph written ont top of OpenGL for Java. It already features hierarchical scene managment and object transform, full dynamic cameras, lights and fog, 2D UI elements scenegraph managment, 2D and 3D mouse picking, and more...
n-able is a cross platform J2ME middleware, providing all the leading edge features required to produce high quality, innovative and addictive 2D & 3D wireless games and applications. It supports MIDP 1.0/2.0, MMAPI & the J2ME Game API.