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.
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.
GameBlade is a set of C++ functions and classes simplifying the most common functions of SDL. GameBlade is treated and used as if it was your own code. It is very small, cleanly written and well documented, including many examples.