PUBLIC MARKS from clochix with tags engine & search

Swoogle is a search engine for the Semantic Web on the Web. Swoogle crawl the World Wide Web for a special class of web documents called Semantic Web documents, which are written in RDF. Currently, it provides the following services to the following services: * search Semantic Web ontologies * search Semantic Web instance data * search Semantic Web terms, i.e., URIs that have been defined as classes and properties * provide metadata of Semantic Web documents and support browsing the Semantic Web. * archive different versions of Semantic Web documents

Sphinx is a full-text search engine, distributed under GPL version 2. Generally, it's a standalone search engine, meant to provide fast, size-efficient and relevant fulltext search functions to other applications. Sphinx was specially designed to integrate well with SQL databases and scripting languages. Currently built-in data sources support fetching data either via direct connection to MySQL, or from an XML pipe.