I use VIM, gEdit (for Cut&Past work on LINUX) and TextMate (Mac).
The cool thing about TextMate is, that you have an editor with a very slim GUI and on the other hand a bunch of handy stuff that simply make your life easier. You can just focus on your work and don't have to fight the editor first. TextMate is a life-time-saver!
Honestly ... TextMate is one of the main reasons why sometime I use a Mac sometimes.
Thanks for the link collection Bryan!
Cheers
Robert »