International Center for Greek Philosophy and Culture  
   The ICGPC is a non-profit academic, research and cultural Institution which was formed in 1987 and established by law in 1990. Its aim is to promote international research into Greek philosophy, and to coordinate and develop the research carried out by sp
   http://www.hri.org/iagp/icgpc.html

International Society for Neoplatonic Studies  
   The ISNS is an organization for the study of Neoplatonism in all of its aspects from the ancient world through the Renaissance and into the modern world.
   http://www.isns.us/

International Plato Society  
   The IPS consists today of more than two hundred and fifty Plato scholars from universities and other academic institutions in thirty-five countries.
   http://www.platon.org/ips/welcome.html

Society for Ancient Greek Philosophy (SAGP)  
   Founded in 1953 and based at Binghamton University. The society sponsors sessions with the annual meetings of the American Philosophical Association, Society for the Study of Islamic Philosophy and Science, and the International Association for Greek Phil
   http://sagp.binghamton.edu/