Business Calendar - I sync my work calendar with Google Calender
Color Notes - Keeps all my lists synced between my phone and tablet.
Percent Calculator - Was a free app one day on Amazon and I use this all the time.
QuickPic - Best photo viewing app for android!
Comic Rack Pro - Syncs my Digital Comics from my PC to my tablet and removed them once read.
Go SMS Pro - Best SMS program with the best filtering options, but its starting to get bloated.
Weather Bug Pro - Still my favorite weather app.
Wifi File Exp Pro - Best way to move files to my tablets and phones from my PC.
Keepass - Best password manager, plus keep your DB on Dropbox and you can access it from anywhere.
MX Player Pro - Best Video player I have found.
Calculator Widget Pro - Missed the HTC one when I got my S3, this is pretty close.
Tune In Radio Pro/Pandora - need music for at work.
Shazam - Beats Soundhound in my opinion.
Aldiko Prem - Best e-read (kindle app sucks).
Battle Ships Pro - great game to play in the bathroom