Piggy Bank: a Firefox extension from the MIT Libraries Digital Library Research Group

Piggy Bank is an extension to the Firefox Web browser that turns it into a “Semantic Web browser”, letting you make use of existing information on the Web in more useful and flexible ways. For details, see the Piggy Bank web site. See also a recent article from Lecture Notes in Computer Science by David Huynh, Stefano Mazzocchi and David Karger: Piggy Bank: Experience the Semantic Web Inside Your Web Browser.