@rhett #aprs for short messages and information retrieval (not so much into positioning). #packetradio or #ARDOP for #winlink emails (no windows, no #vara). #js8call for some asynchronous message and data exchange (not much experience yet). #M17project looks interesting. It is #foss enabling us to execute our #hamradio right to experiment (not like all that closed proprietary stuff: #DMRradio, #c4fm / #ysf and #dstar).