Viking is a free/open source program to manage GPS data.

You can import and plot tracks, routes and waypoints, show OpenStreetMap,
Terraserver, Bing Aerial and other maps in it, download geocaches for
an area on the map, make new tracks and waypoints, geotag images,
see real-time GPS position, etc.

WWW: http://sourceforge.net/apps/mediawiki/viking/index.php