I use TextPad which is great for syntax highlighting, document tree, and also has Java compiling and a Java Applet viewer.
If you are looking for a good free version (at least I think its free): Microsoft Expression Web Good 'ol notepad If you are looking for a good paid version: Microsoft Visual Studio Adobe/Macromedia Dreamweaver Other ones to consider: Coffee Cup HTML Editor (similar to dreamweaver setup) Notepad ++ (Although I have never used this, but hear good things about it.)
NVU looks decent. I just downloaded it. I am going to have to try it out. Looks like a very good Free HTML editor. Possibly better than CoffeeCup.