- https://qsomap.m0trt.radio/
- http://tools.adventureradio.de/analyzer/
- https://www.levinecentral.com/adif2map/
https://stephenhouser.com/qso-mapper
https://www.levinecentral.com/ham/grid_square.php
https://www.whatsmylocator.co.uk
https://www.f5len.org/tools/locator