Aquamacs: Emacs for Mac OS X - now also supports tabs. Hmm. Maybe I should finally get off my ass and make the necessary adjustments and switch. The flexibility of Emacs is unparalleled and Aquamacs now has a really usable - and Mac-like! - interface. (Update: nah, nah, really not. In the moment I used vi to edit the .emacs file, I knew that all the Mac adjustments would be useless)