Titanium Backup - Awesome for backing up your apps, especially if you want to change ROMs. SetCPU - along with rooting and Gumbo Kernel, this thing is awesome. Quick Boot - Quickly boot into recovery, reboot, or bootloader. Dolphin Browser - Awesome browser. Handcent SMS - Much better than the stock app. Beautiful Widgets - It is paid, but they are all great. Weatherbug Elite - The best weather app for Android, in my opinion. Layar - Pretty nifty app. Just try it out. Shazam - identifies a song by listening to it. Very useful if you listen to the radio. Barcode Scanner - Scan barcodes to open things in the Market or web browser. Places Directory - Google's directory. Find pretty much anything. Google Sky Map - Awesome star map even if you don't stargaze. Just check it out. Solitaire - everyone loves solitaire. MetaMorph - if you want some awesome custom themes. Gmail Unread Count - display the number of unread Gmail messages on a widget. ShapeWriter - the most awesome keyboard. Just try it and wonder how you ever used the stock keyboard. Quick Settings - Quickly turn off/on GPS, wifi, Bluetooth, backlight, and mobile data.