Quanta + is an HTML editor for the KDE project.
Quanta + features right-click tag editing, syntax coloring, page preview, syntax checking (via weblint), and project management. It is designed to allow both experienced and beginning web authors create and manage their web projects. In addition to this manual, a complete HTML 4.0 reference is included.
KDE is a desktop environment for Unix. It features ease of use while maintaining complete configurability for the user. More information is available at their web site: http://www.kde.org/
Quanta + uses weblint to provide syntax checking services. More information on weblint can be found at their website: http://www.cre.canon.co.uk/~neilb/weblint/