Emacs for all coding, and general writing. I like it because I've grown very comfortable with it over the years, and the extensive library of lisp allows me to do nearly anything.

(Years ago I wrote a Registry Editor for NTEmacs! Much Lisp is available at https://emacswiki.org/ )

The only exception is writing email for which I use vim. Mostly this is because I use a text-based mail-client (which I wrote) over SSH. So having a daemon-process doesn't make quite as much sense. Vim allows me to easily reply/compose to emails with spell-checking, and that's about the only thing I've turned on.