Decently surprising list, at least for me. I think the Torvalds-Stallman relationship got more complicated in my head.
To be fair, Linus uses uemacs. He says "real" emacs is the tool of the devil ;-) https://plus.google.com/u/0/+LinusTorvalds/posts/iySKQGtkmtb
http://git.kernel.org/cgit/editors/uemacs/uemacs.git/diff/?i...