for my iTouch (which I love & love even more since it was free w/purchase of my Macbook!) I have...
AIM Free
AOL Radio
Audiobooks
Beer Pong Challenge (lol it's kind of fun actually)
Binaural Beats (good stuff for studying background noise)
Bubblewrap
CATA (bus system at PSU)
Checkers Free
Custom Sounds of Nature (again, I like background noise)
Cake Mania 3
Diner Dash Lite
Dots Free
Falling Gems (similar to Bejeweled but free)
Fast Food Nation
Flashlight (useless)
Food Network Nighttime
The Game of Life
I Say Free (it's like Simon)
iBowl
iDoodle 2 lite
iFlash touch (really good flashcard software for your ipod until you had to pay for the computer software that goes with it
)
iHeart Radio
Lemonade Tycoon
LookSee
Mancala
Mini Golf 99 holes
myHomework
Starbucks
Oven Break (lol funny game with a running Gingerbread man)
PacMan
Pizza Hut (love my pizza!)
PSU Live
reMovem
RollerCoaster
Sirius XM
SkeeBall
Tap n Pop lite
Touch Hockey
Touch 4 (Connect 4)
Trace
Wedding Dash
Word Reference (REALLY helpful for anyone taking a foreign language course. This saved my life when I was a Spanish minor...lol)