GPS Track Editor is a Windows application to do everything with GPS tracks. With it you can: analyze and clean up your GPS tracks, make a clear structure of track segments, view your trajectory in color, inspect track points, extract parts of a track, save as GPX, NMEA, or CSV file, merge several tracks into one, generate timestamps.
Comments (2)
Garmin Basecamp is free and does everything....tracks, markers, routes, conversion etc, etc
and you can us any one of a number of maptiles, I use thunderforest and OSM Outdoors.