New Zealand Open Source Society was created in 2003.
Party for the Open Society was created in 1998.
Open Spaces Society was created in 1865.
Open Society Institute was created in 1993.
Open Society Archives was created in 1995.
Open Knowledge Society was created in 2008.
Open Source Initiative was created in 1998.
MapGuide Open Source was created in 2005.
Open Source Shakespeare was created in 2003.
Open Source Geospatial Foundation was created in 2006.
Open Source Software Institute was created in 2000.
Open Source Industry Australia was created in 2004.
Open Source Development Labs was created in 2000.