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OWL ontologies Information on how to open OWL files from the Protege-OWL editor is available on the main Protege Web site. See the Creating and Loading Projects section of the Getting Started with Protege-OWL Web page. Other ways to search for OWL ontologies include using Google: http://www.google.com/search?q=filetype:owl+owl, or the new Semantic Web search engine called Swoogle.

Protege is a free, open-source platform that provides a growing user community with a suite of tools to construct domain models and knowledge-based applications with ontologies. Please see the overview section of the Protege website for a more detailed description of what the Protege platform offers.

"SKOSEd is a plugin for Protege that allows you to create and edit thesauri (or similar artefacts) represented in the Simple Knowledge Organisation System (SKOS)."

WebProtege is an open source, lightweight, web-based ontology editor. Our main goal in developing WebProtege is to support the process of collaborative ontology development in a web environment. Try out WebProtege on our demo server: http://webprotege.stanford.edu

Protégé is a free, open source ontology editor and knowledge-base framework. The Protégé platform supports two main ways of modeling ontologies via the Protégé-Frames and Protégé-OWL editors. Protégé ontologies can be exported into a variety of formats including RDF(S), OWL, and XML Schema.