This is mine!

HTC Desire - TMob - Locked

Abduction! - Doodle Jump like game using cows
Astro - File manager
Barcode Scanner - Well, it scans not only product barcode but also any other barcodes and Q Codes as well
Battery Indicator - Nice battery app with notifications
Compass
Currency - same as iPhone version, easy to use
FXCamera - Fun pics
Nexus One Gallery - Awesome to show off Android Guide here
Goggles - Image search
Google Translate
Handcent SMS - most customizable SMS App ever
Last.fm
Layar - Augmented Reality browser
MSN Droid
Netcounter - check 3G data usage
Notes
Quick system info
Speedtest.net
Tesco Locater
Voice Search Guide here

This post has been edited by alexng2208: Apr 23 2010, 07:35 PM

You can use google maps!!

By the way, i am looking for the app that allow the phone to be a wireless router, any idea?
I am on the yet-to-be-rooted Desire