list of companies and tools in the semantic technology

Hi all,

  Please, Could someone help me?.
  I would need a list of companies and tools that work with Semantic Web techniques.
  
  Thank you for your help,
    



Regards
Luis,

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Dr. Luis Criado
 http://luis.criado.org/

twitter: http://twitter.com/lcriadof
vissem (semantic search engines):  http://vissem.criado.org/
Sw2sws tool: http://sw2sws.sourceforge.net/index.html