A semantic web search tool, and project of University of Maryland, Baltimore County (UMBC), Swoogle has so far indexed over 10,000 ontologies. Swoogle crawls the web looking for documents written in Resource Description Framework (RDF). Though not useful as a Google replacement, this is a great way to start playing with the semantic web. Be sure to browse the Manual and the FAQ’s from links near the bottom of the page. URL: Swoogle.