Prune is an application for viewing, editing and converting coordinate data from
GPS systems. Basically it's a tool to let you play with your GPS data after you
get home from your trip.

It can load data from arbitrary text-based formats (for example, any
tab-separated or comma-separated file) or Xml, or directly from a GPS receiver.
It can display the data (as map view using openstreetmap images and as altitude
profile), edit this data (for example delete points and ranges, sort way-points,
compress tracks), and save the data (in various text-based formats). It can also
export data as a Gpx file, or as Kml/Kmz for import into Google Earth, or send
it to a GPS receiver.