GPS Babel: http://www.gpsbabel.org/
GPS TrackMaker: http://www.gpstm.com/
DNR Garmin: http://www.dnr.state.mn.us/mis/gis/tools/arcview/extensions/DNRGarmin/DNRGarmin.html
GPS Utility: http://www.gpsu.co.uk/
GPS Babel: http://www.gpsbabel.org/
GPS TrackMaker: http://www.gpstm.com/
DNR Garmin: http://www.dnr.state.mn.us/mis/gis/tools/arcview/extensions/DNRGarmin/DNRGarmin.html
GPS Utility: http://www.gpsu.co.uk/