Pickle ( http://www.gp32x.com/board/index.php?showuser=8947 ) is heavily busy, porting a bunch of games to the Pandora.

OpenJazz is a free, open-source version of the classic Jazz Jackrabbit games.

Linked below is a work of progress video of Open Jazz.

http://www.youtube.com/watch?v=XbxCruxNPrs