GPS log file viewer and analyzer
Viking is a free/open source program to manage GPS data
GPS track editor for editing tracks and planning (multiple) day tours
Altimetry profile visualizer
Web Mapping Platform
Open Street Map (OSM) tools, OSM/XML parser, tag extractor
Convert a Garmin ADM database file to a GPX file
MassGeotagger lets you to geotag sets of JPG Photos with GPX logs
GPS data visualisation and exploration