I use Dreamweaver. It is a full-fledged and user friendly HTML editor.

I use Dreamweaver. It is a complete and user friendly HTML editor.

I’m currently using DreamWeaver because I like the features of it and its good user friendly HTML editor. And it’s very helpful to do my web designing works.

Notepad is a great way to learn. Notepad++ is a good one. I used it for a long time.
I also used Aptana for a while. Aside from Notepad++'s features, it also gives code suggestions.
I'm using MS WebMatrix right now. It basically takes Aptana's features and adds in a built-in webserver that automatically launches when I open a project. Makes working with PHP way easier.

I use dreamweaver. It is so easy. Earlier I used notepad. But it is too hard to remember all the elements and very often I forget closing tags.