I discovered HTML-Kit
Not an expert but I like it better than notepad, TextPad, or Scribbler 2000. I don't know anything about Ultra Edit.
HTLM-Kit also inserts any tag with a click of a button. It also can auto-complete. For example I type "<script " and it completes it like this:
With the cursor sitting right in the middle ready for me to type. cool.
HTML-Kit has some interface quirks, and I really don't like how they implemented search, search&replace. But I can live with these because HTML-Kit is freeware