Update: MultiScan3B works for sstv on OS X

I use HAMRS too.

For FT-8 I use wsjt-x and gridtracker and occasionally flrig depending on the radio.

I also use https://time.is/ to check my time, but I haven't needed a separate app to keep it accurate enough - just the built-in time sync.

I haven't done any research yet but I'm looking forward to finding something that will decode weather satellites and sstv.