(X)HTML Editors

WYSIWYG
Macromedia Dreamweaver	$400. Probably the most popular editor among Web professionals. Now belongs to Adobe. For Macintosh and Windows.	http://www.adobe.com/products/dreamweaver/demo available
Adobe GoLive	$400. Purportedly more friendly than Dreamweaver. For Macintosh and Windows.	http://www.adobe.com/products/golive/ demo available
NetObjects Fusion	$200. NetObjects WYSIWYG editor for professional Web masters. Windows only.	http://www.netobjects.com/ demo available
Text Based
BBEdit	$200. Excellent HTML editor from Bare Bones Software. The most popular non-WYSIWYG (X)HTML editor. Macintosh only.	http://www.barebones.com demo available
HTML-Kit	Free. ("Registered" version is $55). Chami.com. Hundreds of plugins available for added features. Windows only.	http://www.chami.com/html-kit/
jEdit	Free (Open Source). Many plugins available for added features. Java based and so runs on Mac, Windows, Linux, etc.	http://www.jedit.org/