
1) Free software programmed in C
Found on
https://www.crosswordclues.com/clue/gpsbabel

GPSBabel is a cross-platform, free software to transfer routes, tracks, and waypoint data to and from consumer GPS units, and to convert between over a hundred types of GPS data formats. It has a command-line interface and a graphical interface for Windows, OS X, and Linux users. GPSBabel is part of many Linux distributions including Debian GNU/Li...
Found on
http://en.wikipedia.org/wiki/GPSBabel
No exact match found.