Angry Birds!!!!!!
An ap called Paper it's by some former Microsoft employees and the company is called 53. Haven't had much time to play with it but it a pretty cool app for sketching and note taking. I like that it is free and the extra tools features are priced individually and are not too bad.
Cycletrader so you can look for that new FZ6 or R6 or FZ1 or .....
USA Today is free CNBC RT is a good app for looking at the stock market in real time and you can put together a portfolio without having to say how many shares of xyz you own.
Calculator Pro is a pretty good calc - think I paid for it but has a cool background that looks like a crumpled piece of graph paper. Nice to show when everyone else pulls out their "fancy" calc tools.