Marketplace Pick: xMaps
xMaps is an offline map application that allows you to download worldwide map data from Openstreetmaps directly to your phone. The program will show your current GPS position along with your speed and altitude. Tag your favorite places with a marker for future reference. xMaps is an ideal program for bike tours, hiking, or venturing out where there is either roaming data or no data. The program costs $1.99 on Windows Mobile Marketplace.