This is my short list of apps that didn't leave me feeling ripped off. If you know of an app that is really good post it here please so hard to sort through them all in that app store.
1. AirAttack HD (most fun I ever had for a dollar)
2. Luminos (only astronomy app thats actually useful in the field)
3. Rage HD (awesome graphics but be advised, only 3 levels)
4. NPR (the radio app, man I love this thing in the mornings!)
So post the ones you love!