Gnowledge Network and Organising System. http://www.gnu.org/software/gnowsys/
WikiPedia: http://en.wikipedia.org/wiki/GnowSys
It is developed by Nagarjuna G. at the Homi Baba Centre For Science Education, TIFR, India
GnowSys is a free web application for development and maintenance of SemanticWeb information. It is developed in PythonLanguage and now used Django (See DjangoProject).
Older versions used Zope (See ZopeApplicationServer).
Further information: http://www.gnu.org/software/gnowsys/GNOWSYS_files/cpv2/index.html
The current released software is available at http://www.gnu.org/software/gnowsys/.
-- JohnFletcher