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Viking is a free/open source program to manage GPS data. You can
- import and plot tracks and waypoints, show Google maps and/or
+ import and plot tracks and waypoints, show OpenStreetMap (OSM) maps and/or
Terraserver maps under it, add coordinate lines, make new tracks
and waypoints, hide different things, etc. It is written in C
with the GTK+ 2 toolkit, available for Linux, other POSIX