Long live WordStar and it's many brethren!
I got addicted to it when coding Z80 assembler on CP/M in the late 70's and my life since then has been on a constant lookout for an equally good program in other OS's.
In Linux and MacOS terminals there's Joe, a godsend. But since I use Qt a lot, of course the first thing I wrote was a Wordstar clone plugin for Qt Creator. Not possible to survive otherwise :-)