From back when (non-avian) dinosaurs roamed the world - "Grail is an extensible Internet browser written entirely in the interpreted object-oriented programming

From back when (non-avian) dinosaurs roamed the world - "Grail is an extensible Internet browser written entirely in the interpreted object-oriented programming language Python", available at http://grail.sourceforge.net/ http://grail.sourceforge.net/ > Grail lets you download Python programs that execute inside Grail on your local machine. These little applications ("applets") can do things like display animations, interact with the user in new ways, even create additional menus that pop up dialogs if you like.