I did my last two mods in notepad. If anyone has ever tried to program in notepad, they'll probably know how terrible of an idea that is. Seriously no syntax highlighting or line numbers. Agh. Anyway, what text editors are good for this? I last did programming on a linux box where the distro came with text editors that could do things like syntax highlighting and word wrap without breaking shit. So I'm not actually sure what text editors are good on windows? Or for that matter, other OS's. The main need would be XML syntax highlighting and line numbers, really.
http://notepad-plus-plus.org/ Syntax highlighting, line numbers, lots of features yet as lightweight as notepad. I use it for everything.
As Daynab said. I will never use Wordpad nor Notepad again. That freeware tool is the way to go. The only thing I dislike about it is that you have to click each and every file association you want instead of having an easy "Associate with all supported formats" button somewhere.
It being a text editor, "All supported formats" is going to be any non-binary file, and possibly then some. Soooo... that I'm not shocked by. But anyway checking it out, looks like it'll work fine. (though now I know how many lines my mod's spellDB has... I'm not entirely sure that's a good thing ahhhhhhhhh)
Don't worry, for as long as its shorter than mine, you have nothing to fear. Hint: 7.947 lines, the last time I checked.
I have been using Notepad++ for a long time now, and I have it associated with everything. Including things that usually are binary/decimal/hexdecimal/other data. For example, it is associated with anything ending in dat and that can be a problem with some things. But unlike Windows Notepad, it does not crash hard when it tries to open a massive data file that is useless to even look at. You will love it.