KompoZer is a complete Web Authoring System that combines web file management and easy-to-use WYSIWYG web page editing capabilities found in Microsoft FrontPage, Adobe DreamWeaver and other high end programs. It is a free and open source HTML editing application that's user friendly, attractive, comprehensive and advanced.
Here are some screenshots to illustrate the features and user interface of this application:
Google Web Designer
WinCHM
HTMLPad
WebsitePainter
PageFocus Pro