I'm always surprised that PSPad [1] doesn't get mentioned much in these conversations. I find the built-in utilities are more numerous and work much better than Notepad++. It also handles large files much better IME.

It may be that the customisation is a bit less polished (eg, no way to quickly set themes) and the user community is less developed. But it really does everything and much better than the others IMHO.

[1] - http://www.pspad.com/en/

edit: words