Open Mobile Maps is a google maps clone relying on OpenStreetMap.org maps.

Features:
– showing map in fullscreen
– finger friendly user interface
– map tiles are automatically downloaded if internet connection is available
– map tiles are stored locally for offline use
– GPS support and GSM triangulation
– show actual position on map
– follow-mode to automatically scroll the map
– search addresses
– calculate routes
– gps and gsm tracking (not yet implemented)
– choose between different OSM servers (not yet implemented)