BuildorPro is a browser-based WYSIWYG web page editor. You can load any web page into the editor by specifying its URL. It also comes with an FTP client so that you can upload changes back to the web server. Despite being a WYSIWYG editor, you have full access to the HTML/CSS code, and can easily combine hand-coding with output from the design tools.
BuildorPro comes in a "Lite" and "Pro" version. The former is strictly for personal use only.