Viking is a free/open source program to manage GPS data
Simple GPS tracking server
GPS log file viewer and analyzer
GPS track editor for editing tracks and planning (multiple) day tours
A Matlab software to estimate Euler pole parameters
Earth orbits and satellite coverage display in 3D on your laptop.
Mala ProEx and Easy Locator GPR control software
Open source system for GPS tracking devices
NMEA 0183 library for Java
NaveGo: an open source MATLAB/GNU Octave toolbox for processing integr
Tool to work on map data, to check the data and generate your own maps
Plugins for OpenCPN
A software gps simulator
C API to control NexStar compatible telescopes
GPS mapping and management software
CAD 2D for Land Surveying and Civil