I was just coming here to do this...
1) SMS Backup & Restore
2) SMS Backup
3) Call History Backup & Restore
4) Advance Task Killer
5) Astro File Manager (free)
6) ConnectBot
7) Google Sky

Google Voice
9) Googe Maps (update)
10) Google Earth
11) google goggles
12) Evernote
13) last.fm
14) Opera Mini - this is THE best browser for
http://text.returntothepit.com all the other browsers suck cause of zooming. The one problem with Opera Mini is the clicking of the "Qik Reply" button.
15) fancy widget
16) ringdroid
17) Android Agenda