http://www.nav4all.com/

http://www.amazegps.com/

Both are free. On my xv6800 Nav4All needs a primer program to get working, and lost it's connection before getting to my house. amAze did not need a primer but seems a bit buggy and locked up my phone. It also does not keep the screen active, so the phone goes into suspend and shut off the GPS.

Directions from both were hit or miss. amAze practically argued with me for 20 minutes before recalculating my route to take the nearby highway.

Honestly I prefer Windows Live Search over them both. It just works, finds the route that I want to take, and beeps at me when I get close to a turn. amAze will be very nice once they work out some of the WM issues.