Mapping

GPS Tuner supports JPG files as maps

Easy Calibration on Pocket PC or using Desktop Map Calibrator (free) program

Auto map loading feature

Zoom and Pan by pen or joystick

Flexible layer and track/route display

Distance measuring and route defining by drawing on map

Blank map support

Navigation, Digital Compass

Real time rotating compass with big target arrow

Custom target from entered coordinate

Any waypoint, trackpoint or point of map can be selected as target

6 different types of Compass views

38 selectable Compass tools

Voice navigation and next turn indication for routes

More info:
http://www.gpstuner.com/overview.htm