GtkHTML is a HTML rendering/editing library. GtkHTML is
not designed to be the ultimate HTML browser/editor: instead, it is
designed to be easily embedded into applications that require
lightweight HTML functionality.

GtkHTML was originally based on KDE's KHTMLW widget, but is now
developed independently of it. The most important difference between
KHTMLW and GtkHTML, besides being GTK-based, is that GtkHTML is also
an editor. Thanks to the Bonobo editor component that comes with the
library, it's extremely simple to add HTML editing to an existing
application.