Bluefish (http://bluefish.openoffice.nl) is a powerful editor for web designers and programmers working in Linux or Mac OS X. It supports many programming and markup languages, but it focuses on editing dynamic and interactive websites.

Here are some screenshots:

BlueGriffon is a complete WYSIWYG (what-you-see-is-what-you-get) web authoring system for Linux, Windows and Macintosh which is based on the program NVU. No technical expertise or knowledge of HTML is necessary to create web pages. More information can be found on www.bluegriffon.org.

Here are some screenshots: