Viking is a free/open source program to manage GPS data
GPS track editor for editing tracks and planning (multiple) day tours
Open source system for GPS tracking devices
Tool to work on map data, to check the data and generate your own maps
Plugins for OpenCPN
CAD 2D for Land Surveying and Civil
Land survey field crew data management for .RAW and .JOB file types.
Apl. móvil de Información georeferenciada + visor 3D escritorio
CAD 2D for Land Surveying,Civil and more
a free and open map of wireless communicating objects
GPSBabel converts and transfers data like waypoints, tracks & routes.