There is lots of new GPS software in the market and at work we have started to test them out. So far I have tried:

Inav iGuidance
Navigon Navigator
Pocket Streets

So far Mapopolis is my fav, as it is up to date and nice and clean. The best look and feel is Navigon, but I think it has a bug, when I try to setup a trip, it cuts it really short, like after 500 m, it thinks I am at my destination. Weird. Wonder if anybody else had the issue. I am using 5.1