KompoZer is a wysiwyg HTML editor (Nvu/Composer fork) aimed towards advanced users. I consider it as an unofficial bug-fix release for Nvu.

KompoZer is again active. A new release (July 23, 2007) is available from SourceForge while future updates are promised.

The developer is discussing bugs and new developments on a support forum, WYSI Free Authoring, http://wysifauthoring.informe.com.