GPSBabel converts waypoints, tracks, and routes between popular GPS receivers such as Garmin or Magellan and mapping programs like Google Earth or Basecamp. Literally hundreds of GPS receivers and programs are supported. It also has powerful manipulation tools for such data.
GPS Date Converter (GDC) is a small utility to convert six different date formats, including: (1) decimal year, (2) year, month, day, (3) year, day of year, (4) GPS week, day of week, (5) Julian date, and (6) modified Julian date.
VisualGPSView incorporates many advanced features found in professional programs. Its sole purpose is to display graphically specific NMEA 0183 sentences.
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