To code a web page by hand, html/php etc, you may use a text editor:Kate
If you like WYSIWYG coding, then the following would be a useful program for you:Quanta
[Install "kdewebdev" Using Package Manager]http://quanta.kdewebdev.org/
For experienced web designers and programmers:Bluefish
[Install Using Package Manager]http://en.wikipedia.org/wiki/Bluefish_(text_editor
Based on Gecko, as Firefox, its fast, reliable and provides effective support for web standards (XML, CSS JavaS. etc). It supports HTML and WYSIWYG editting.http://www.kompozer.net/features.php
If there is anything you feel should be on the list, please post a suggestion, and I will modify my post accordingly.
(P.s. NVU is a discontinued project)