GPS log file viewer and analyzer
Viking is a free/open source program to manage GPS data
Minimalistic wide-open GPS-locator/tracker
A C library for parsing/normalizing street addresses around the world
Plugins for OpenCPN
Build your own GPS unit
A reference implementation of the Polish geobotanical grid
GPS mapping and management software
Open Source Marine Chart Plotting Program
This is a port of LibRTK on C#, and into a small c/c++ library.
Satellite Emulator
A tile-based map viewer with support for GPX files.
Toolbox for geoscientists and geo enthusiasts
Whitestone Interactive GPS Software for .Net
Shortest Path Navigator with Directions and Distance
A software to manipulate RINEX 3 files
Plugin for OpenCPN
a free and open map of wireless communicating objects
GPS data in a file for development testing
PC/PocketPC tool to get tracklogs from the WBT-201 GPS logger