J.P.
Go to Amazon and download the app store. You can get 1 free aPP a day (they are marked free for one day and then go back to regular price). Nice thing is that the free apps are saved so if you change phones you can still get them back.
Onto my favorite apps:
Facebook for Android
Amazon kindle
Screeble pro
Opera browser
Cam scanner
Wifi explorer
Water your body
Flash light app (tiny flashlight unless you have HTC because they have their own)
Star chart
Google earth
Photaf (takes panoramic pics)
Real calc
Picasa (stores photo's)
Groupon
Living social