PulpCore is a new open-source Java sprite-based game creation framework. PulpFizz is a set of extensions to PulpCore, integrating vector graphics and physics simulation capabilities (using JBox2d, a Java port of Box2d, for physics).
Update 16 November 2008: We are in the midst of a major refactoring, so the codebase is not usable at the moment. When we're back, PulpFizz will be better than ever, but until then we apologize for the delay.