I use Gtunes for music.
ESPN Score Center of course
DirectTV if you have a DVR
Nesoid is good for games (roms are hit or miss though)
Shopper is a great bar code scanner
Smart measure to measure distance
Also have a scientific calc (i'm a math teacher)
A good antivirus, and advanced task killer to keep your battery life up.
That should get you started
PowerAMP for a music player
PDA net and Wireless teather for free broadband that Verizon can't track