Quanta is a web development tool for KDE. It was designed for rapid web development and has become a mature editor with a number of great features.

Quanta is often used by professional developers, but it's also easy to quickly get started if you've never used it before.

Bluefish is another popular Web page editor for Linux. Bluefish can be found in the "WWW" section of the Networking menu if installed on your machine.