/me uses a text editor... but i'll say topstyle http://www.bradsoft.com/topstyle/index.asp ... i haven't used it since version 1.5 tho
I'm new to WYSYWIG editors.. so I'm a mainstream lamer that is going to suggest Macromedia's Dreamweaver...
I also use topstyle, but only some of the time... otherwise i just use good ole' notepad and hack em manually.
notepad unless i do some editing of files on the server, then I'll just use my preferred unix text editor...which happens to be jed (also reccomended are vi, vim, pico & joe)