Organic Maps is a free Android & iOS offline maps app for travelers
Lightweight GPS Logging Application For Android
Viking is a free/open source program to manage GPS data
GPS log file viewer and analyzer
GPS track editor for editing tracks and planning (multiple) day tours
Create, edit view GPX tracks (in the background - online maps)
eGPXviewer is a 3D GPX track viewer
Java Library for working with gpx files
GPS mapping and management software
Map application using OpenStreetMap data
Application to browse and visualize your GPS files
A tile-based map viewer with support for GPX files.
Obtain your cycling power
Convert a Garmin ADM database file to a GPX file
GT2 combines online and offline navigation for hikers and cyclists
FAA digital chart viewer for iPhone and iPad
Aircraft navigator with HSI for TomTom devices
Analyze gpx files and store summary in Sqlite database