viking: viking (gps data management software) viking: viking: Viking is a free/open source program to manage GPS data. You can viking: import and plot tracks and waypoints, show Terraserver maps under viking: it, add coordinate lines, make new tracks and waypoints, hide viking: different things, etc. It is written in C with the GTK+ 2. viking: viking: https://sourceforge.net/projects/viking/ viking: viking: viking: