MapsGo is a simple GIS for Desktop PC and Pocket PC. You can also export maps and database files to MapMap GIS for Palm (by Paul Sokolovsky). You can export the maps from ArcView, export and import dbf, txt files and do a GPS export and import.
Its easy to use interface, wide range of available maps, GPS functionality and a wide range of compatible maps - all make MapsGo an excellent, free soultion for viewing maps on your Pocket PC.
With MapsGo, you'll never get lost again!