I use Emacs (GNU). My main use of Emacs is for editing (La)TeX files—the (La)TeX capabilities of Emacs (AUCTeX) are amazing—for papers on formal semantics and historical linguistics.
Homepage: http://www.jnanam.net/slade/
Lingblog: http://staefcraeft.blogspot.com
Techblog: http://babbagefiles.blogspot.com (including some Emacs-ish keybindings for the Firefox Pentadactyl / Vimperator plugin here: http://babbagefiles.blogspot.com/2010/11/hack-emacs-like-bindings-for.html )
Welcome to the wiki. – DrewAdams