Here is a short list of free Apps which I recommend ... all found via iTunes Store apps search ...

Incidentally, I have no business interest in any of these apps, they are just fun.

HoopsLite by Skyworks (try your slamdunk skills)
Chess by Optime Software (nuff said)
Four Free by Optime Software (the Connect 4 game)
iBowl (10 pin bowling)
Morocco (an iPod version of Go)
Paper Toss by Backflip Studios (cool office fun)
Labyrinth Lite (marble maze with a difference)
Mindreader by Digital Chocolate (I can guess what you are thinking)

.... have fun!

WulfieSmith