TextMate is not free software. Also, emacs lets you redefine nearly any of the functionality on the fly without restarting (everything except the very core whi

TextMate is not free software. Also, emacs lets you redefine nearly any of the functionality on the fly without restarting (everything except the very core which is written in C). I'm not sure if TextMate can do that, as I try to use as little proprietary software as possible.