Iceland is missing. I would expect it to score high on that chart.
https://pubmed.ncbi.nlm.nih.gov/8262106/
mu4e+mbsync+msmtp
The ancestral high-protein diet: drinking the tears of your fallen enemies.
Not yet on https://signal.org/android/apk
The Malazan Book of the Fallen, by Steven Erikson.
That could be very useful when using a text-based web browser (e.g. TUI)
I am not an expert, but I see that the Apache license has no copyleft.
Have you heard of Beeper?
I think Matrix has bridges to all these networks, except ActivityPub (it may, I just don't know).
@sylphio