[77Dinaartickire]

I have a lot more, but these are the ones I think are good to have.

ES File Explorer (can access root level areas and supports onlines services like dropbox)
Barcode Scanner
CPU Spy (good for diagnostics)
Battery Widget Pro
Gas Buddy (Find fuel prices)
Key Ring (Stores value cards and membership cards and displays a barcode so the store can scan it straight off the phone)
Parcels (Track packages online)
My Cars (Keep auto records like fillup costs, mileage, service reminders, etc)
RealCalc
Rom Toolbox Pro (All in one program that replaces Titanium Backup, Rom Managers, Overclocking Control, Font and animation switcher, and lots of other tools)
SD Card Tester
Better Battery Stats (Diagnostic tool)