I actually use notepad quite a bit. When I'm working on a website at school, or even on my laptop, when I don't have programs such as Dreamweaver, I use notepad. I like notepad because it doesn't crash, or get in the way memory-wise and loads instantly. There are many features that are better in other website programs, but I find that notepad is quite handy in many respects including tweaking and updating of information.
If you don't like notepad, there's a program with the same light-weight called metapad.
metapad It has other features that are nice to have if you like notepad.