GDM6 and GPSTrackMaker - Both are free
I use GDM6 to split out my track logs from my waypoints then save each to different file names. While I'm in GDM6, I name my tracklog.
I use GPSTrackMaker to manipulate my waypoints. TrackMaker is graphical and has a background map of the US. Makes it easier to label my waypoints based on location on the lake.
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