Kompozer is an open source web development tool built on NVU. The project strives to fix bugs in the NVU project and added new features to it. Both the HTML editor as well as the CSS editor has so far be fixed and updated as part of the Kompozer project - and many more changes are scheduled. Apart from that the main feature set is exactly as in NVU. And one of the most important features is still that editing take place in WYSIWYG (What You See Is What You Get) mode allowing you full control of layout as you work with your web design.