HoudahGPS – Download and convert GPX, NMEA and KML track log and waypoint files.
HoudahGPS is a front end to the open source command line tool GPSBabel. It allows you to transfer track log and waypoint data from your Garmin, Magellan or Wintec GPS devices.
It connects via USB to the Garmin and Magellan devices. It interfaces with the Wintec WBT-100, WBT-101 and WBT-201 devices using Bluetooth.
HoudahGPS may also be used to convert between the GPX, NMEA and KML log file formats. The Sony GPS-CS1 track logger uses a special variant of the NMEA format which may also be read.
Free for Mac OS X 10.4.8 or later.