yeap, i use evernote as well. really useful.
Google Mobile app is pretty cool too. You just move the phone to your ear, say something, and it finds it.
MarketingProfs is awesome. Gathers marketing articles and information
CoolIris is awesome for browsing photos.
Pandora for user customized internet radio
Snaptell is good too. you can take a pic of a book, cd, movie, game and it will give u pricing and reviews. i just got it so i dunno how useful it will be
One of my personal favorites is DynoLicious. Its a dyno for your car. reads out 0-60, 0-100, 1/4 mile times. horsepower at the engine and to the wheels. g's on a skidpad, etc...
For fun and games:
TapDefense rocks and is free
CritterCrunch isnt free but is one of the coolest puzzle games with good graphics
CubeRunner is very simple but very fun
HoldEm poker isnt free but its great
FieldRunners - tower defense game with awesome graphics