Astrogrid

"AstroGrid is a UK government funded, open source project designed to create a working Virtual Observatory (VO) for UK and International astronomers. Working closely with other VO projects worldwide through the International Virtual Observatory Alliance (IVOA), internationally recognised interface standards are emerging which promote true scientifc interoperability of astronomical data and processing resources worldwide. AstroGrid is a leading member of this community."

http://www2.astrogrid.org/