KompoZer

KompoZer (formerly Nvu) is an easy-to-use WYSIWYG web development program. It capitalizes on its easy-to-use web page editing capabilities (including both HTML and CSS) as well as its web file management. It is designed to be extremely easy-to-use for non-technical computer users who want to create an attractive professional-looking web site. Basically, if you want a web page but don't want to spend time learning the ins and outs of HTML and CSS or spend the money hiring somebody who has learned it, I suggest you take a look at this completely free program.

Portable version is available on PortableApps.com