Komodo is a cross-platform IDE from ActiveState, built on the Mozilla code base.
Author: ActiveState Corp. Homepage: http://support.activestate.com/products/Komodo Family: IDEFamily Platform: Windows, Mac OS/X, Linux License: Commercial
The full IDE is a commercial product. The editor component, KomodoEdit, is free, and may be downloaded here: http://activestate.com/products/komodo_edit/
Screencast: (Java applet)http://community.activestate.com//node/1083