Event_Logger is a tracking and logging application enhancing TomTom GO. It produces standard GPX files with waypoints and sequence of track points; off-road tracking is also allowed.
GPSBabel converts waypoints, tracks, and routes between popular GPS receivers and mapping programs. It also has powerful manipulation tools for such data.
GPS Visualizer (GeoVisualizer) is a free utility that creates customizable maps and profiles from GPS data (tracklogs & waypoints), addresses, or coordinates.