Brett - the obvious ones like Google Earth, but also Google SkyMap, Camp Compass, Satellite AR, GA Cacher, Bubble.
Oh - and Spotify if not already on your phone.
There was a previous thread on apps for android - gr8 ideas on that.
Enjoy OziAndroid... I'm lovin' it. Just make sure your maps in the map path aren't more than 2 sub folders down.
- Finners