MLB At Bat
Twitterrific (twitter feed manager)
Shazam (music identifier)
New York Times
Yelp
Where
Pandora
Enjoy Sudoku Daily (great learning tool for Sudoku)
Checkers
Morocco (Othello)
Lux DLX (Risk with lots of maps and a decent AI)
Scramble (Boggle)
Y! Fan Pro (Yahoo fantasy sports)