gpx3dprofile generates a 3D view of the first track or route in a GPX file.
gpx2tour generates a .tour file for Hac4linux from a GPX file.
If you have a GPS device and want to track the device on real-time basis on a map, Web GPS Tracker will allow you to do this. It is a quick and dirty (but working) application.
addboint is a script that generates and adds waypoints of found caches to a file. This may be useful for some geocachers.
A partition or disk cloning tool similar to Symantec Ghost.
A network protocol analyzer.