GPS log file viewer and analyzer
Viking is a free/open source program to manage GPS data
Tool to work on map data, to check the data and generate your own maps
Plugins for OpenCPN
GPS mapping and management software
Land survey field crew data management for .RAW and .JOB file types.
A gui for linux users of miniHomer, a GPS tracker
Visualize data from the opencellid.org project
a free and open map of wireless communicating objects