Ontologies

Protégé Ontology Editor

Protégé is a free, open source ontology editor and knowledge-base framework. The Protégé platform supports two main ways of modelling 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.
http://protege.stanford.edu/
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GovTalk (UK)

The purpose of this site is to enable the Public Sector, Industry and other interested participants to work together to develop and agree policies and standards for e-government.
http://interim.cabinetoffice.gov.uk/govtalk.aspx
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ICSTI - International Council for Scientific and Technical Information

ICSTI, The International Council for Scientific and Technical Information, offers a unique forum for interaction between organizations that create, disseminate and use scientific and technical information. ICSTI's mission cuts across scientific and technical disciplines, as well as international borders, to give member organizations the benefit of a truly global community.
http://www.icsti.org
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SKOS Core

SKOS stands for Simple Knowledge Organisation System. SKOS Core is a model used to describe 'concept' schemas and the relationships between them. For example, glossaries, thesauri, controlled vocabularies. Functionality:  Provides a framework for expressing knowledge organisation systems in a machine-understandable way. Level of Expertise:  Good understanding of the concept of ontologies and descriptive schemas, such as RDF.
http://www.w3.org/TR/swbp-skos-core-guide
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The DCC is funded by

Joint Information Systems Committee