OkMap is a GPS and map software that:
-Works with vectorial maps and calibrates raster maps
-Organizes paths by creating waypoints, routes and tracks
-Uploads/downloads data to/from your GPS
-Uses altitude DEM data
-Supports GPS real-time navigation
-Sends/receives vehicles position and display tracks on maps in real time
-Provides autorouting and geocoding functions
-Supports integration with Google Maps/Earth (in 3D also)

Potential use:
-Search and rescue
-Trekking
-Off road
-Boating
-Flying
-Mountain bike
-Geocaching
-Hunting and fishing
-Finding mushrooms
-Soft air

Main features:
-Calibrate raster maps with different cartographic projections
-Create own digital maps importing / drawing shapes
-Create and manage waypoints, routes and tracks in GPX format
-Download, save and automatically georeference maps from Google Maps
-Support autorouting, geocoding and inverse geocoding functions
-Use digital terrain models to store and display elevation
-Upload / download data to / from GPS devices
-Navigate in real time through NMEA protocol
-Map tiling for handheld GPS
-Display Google Earth and Google Maps in current map location
-Exchange data with Google Earth and view your map in 3D
-Find nearby cache in www.geocaching.com
-Exchange data with gpsgate.com server
-Receive navigation data from remote GPS devices
-Send the current position to an OkMap remote server
-Make conversions between coordinates, datums, formats, ...

Supported formats:
-Images: ECW, BMP, GIF, JPG, PNG, TIF and many others
-Maps: World file; ECW; GeoTiff; KML/KMZ; OziExplorer; CompeGps; GPS TrackMaker; GpsTuner
-Map Tiling: KML, KMZ, JNX, OruxMaps and OkMap
-Vectorial data: SHP, DBF (Esri shape file); DCW (Digital Chart of World)
-GPS data: GPX (GPS Exchange Format); CompeGPS, EasyGPS, Fugawi, Garmin, Geocaching LOC, Google Earth (kml/kmz), GPS TrackMaker, Open StreetMap, OziExplorer and others
-DEM data (digital earth model): HGT (SRTM-1 e SRTM-3)