Does it keep itself current for you? When I had it, the notifications and such were hours off (sometimes even by a day) so I just switched to using the site.
Arity - 3d graphing calculator
Barcode Generator
Catch - note taking app, also records GPS and you can take photos (good for keeping fish logs) it syncs on their site too.
Cube Extended - I just got this music player and it seems pretty cool, I also use Museek (better for using it on Random and Smart Shuffle).
Dolphin Browser HD - almost a must. Tabbed browsing and a lot of cool ad on's. A lot of people claim to have an issue with speed, but I don't.
Google Earth
Dropbox - Gives you 2GB of online space that you can access from any PC or your phone. Great for backups and files. If you sign up, PM me and I will give you a refferal link and you and myself will get 250 MB of extra space (they max out the free accounts at 8 GB.)
Glyder 2 - (get the free one) a fun game to kill time with, you just fly around and collect things...
Guns'n'Glory - another free game. You set up cowboys and other western like people and shoot at settlers that come through canyons (it's similar to a Real Time Strategy game, just try it, it's fun).
Key Ring - Keeps all of my club cards in my phone and they can scan the barcodes off the screen.
Listen - Podcast's
Live TV - Flaky, but you can watch some major networks on your phone. Pretty cool (when it works).
My Maps Editor - Very awesome app for mapping out lakes and other things. It's basically google maps, but you can draw on it and add notes then save the link and share it with others (I map structure and fish with it).
Pandora - Online music player, I think you all know what it is.
RemoteDroid - Use your phone as a wireless keyboard and mouse. Works great (I use it when I watch movies from my PC to my TV) It uses a WiFi connection, all you do is install the PC software, enter the IP it gives you into the phone and it's done!
TeslaLED - Uses the camera flash for a flashlight
Thinking Space - 'Mind Mapping' software. I use it to brainstorm ideas or keep lengthy notes.
TweetCaster - I use it to update twitter and FB in 1 shot. Works better than the twitter app HA.
And the most important app:
Wilford Brimley Soundboard! HA