Apps I've tried that worked:
Amoebax (GP2X)
Blingo (GP2X)
Bubble Train (GP2X)
Camelot Warriors (GP2X)
Dastardly Dungeon (GP2X)
Duke2X (GP2X)
Flobopuyo (GP2X)
Cave Story (GP2X)
Hyperion demo (GP2X)
Jump'n'Bump (GP2X)
Knight Lore (GP2X)
Lady Killer (GP2X)
Methane Brothers (GP2X)
Odonata demo...