Kindle - syncs to the furthest page read on my Kindle and vice versa
Flight Track Pro - keeps flight data and provides alerts
My TSA - provides airport information (delays, security checkpoint wait times) and reminders about what is permissible in carry-on
Rocket Taxi - allows you to find and call nearby cabs; has a trip calculator
Siri Assistant - you can ask it anything (e.g. what movies are playing today) - it's sort of like voice-operated Google
Good Food, Local Eats, and
Yelp for restaurant recs on-the-go
ConvertBot - to convert currency, temperatures, etc.
AwesomeNote and Evernote - for organizing notes
Gymboss - an interval timer and stopwatch
Red Laser - lets you barcode scan items and see if they are cheaper elsewhere
Angry Birds,
Flight Control,
DoodleJump,
Bookworm, Skee Ball - totally addicting fun
Instant Poetry - just like magnetic poetry of the past
10 Pin Shuffle - shuffle bowl
BBBox Pro - sound effects machine (I purchased this for use in my middle school classroom)
LoMob, Plastic Bullet, Diptic, and
Color Splash - for fun with photo effects
IncrediBooth - like an old-fashioned photo booth
iParty - like Catchphrase - I am about to chaperone a group of HS students overseas, and I think this will be a great way to pass time
Twitterific - if you tweet
Um, yeah, I might have a problem...