This is just a list of applications that I've found useful.
AdFree
Advanced Task Killer
AndSMB
Astrid Tasks
Barcode Scanner
Bubble
Cache Cleaner NG
Clockwork Mod Recovery
ConnectBot
ConvertDroid
CPU Tuner
Dolphin Mini
Droid 2 Bootstrapper
ElectroDroid
Fast Reboot
G-MoN
LBE Privacy Guard
Lookout Mobile Security
Netflix
Network Info II
Note Everything
Open Signal Map
Overlook Fing
Pocket Empires
Quadrant Standard
RealCalc
Ringdroid
ROM Manager
Root App Remover
Simple Calendar Widget
Speed Test
Superuser
Tesla LED
Titanium Backup
Tricorder
Voodoo OTA Rootkeeper
Widgetsoid
Wifi Analyzer
Wordfeud FREE
z4root
Zedge
Zoner AntiVirus