It's available for WM 6.1 or 6.5, requires .NET CF 3.5 and Internal GPS and at the moment is only available for VGA and WVGA.
NaviComputer is a finger friendly pocket pc software to handle Offline GPS Maps on windows mobile. The best part of this app is the ability to Download maps with the included PC Program “NaviMapper” , which means NO dataplan needed once the maps are on your device.
Following (multi layer) maps are fully supported:
Let us know if you find it useful. Read more and download here.