Easy Dialer (Great speed dialer)
Speed Dialer (reduces clutter on your home screen)
Action Complete (location enabled to-do list)
Advanced Task Killer (extends battery life)
Barcode Scanner (scans QR codes)
Bump (transfer files/pics/contact info via a 'bump' like the iphone)
Droid Light (turns your flash into a flashlight)
Evernote (reall great note taking app)
Key Ring (stores all of your membership cards- just pull up the one you want and have the cashier scan it off your phone)
Mabilo Ringtones (tons of great free ringtones)
Movies by Flixter (find theaters and get showtimes close to you)
Pandora (streaming internet radio)
Pdanet (use your phone to tether without the tethering plan)
PDF Viewer (obvious I hope)
ShopSavvy (scan a barcode and it searches for a cheaper price near you)
Talk To Me (speech to speech translation)
Trapster (find speedtraps redlight and speed cameras)
WeatherBug (great widget for weather)
Where (finds cheap gas, local restraunts, news, cupons, etc)
WaveSecure (this one is awesome - but only a 7 day free trial. Instead of me trying to explain and get flagged as spam just search the app, basically it'll gps locate and let you lock/wipe data in case it's stolen, also lets you back up all of you stuff....WORTH IT!)