Cybernetics & Human Knowing  
   A Journal of Second Order Cybernetics, Autopoiesis and Cyber-Semiotics.
   http://www.imprint.co.uk/cyber.html

Chilean School of Biology of Cognition  
   Offering overview of Maturana's contributions to psychology, 'Ask Professor Maturana', and online archive editions of important articles.
   http://www.inteco.cl/biology/index.htm

Radical Constructivism  
   The most comprehensive Webspace on constructivist epistemology (a component of the second-order cybernetics worldview), especially the work of von Glasersfeld and von Foerster
   http://www.univie.ac.at/constructivism/

Towards an Ecology of Mind  
   Well-organized site addressing (e.g.) Gregory Bateson, Humberto Maturana, Ernst von Glasersfeld, Heinz von Foerster, and George Kelly.
   http://www.oikos.org/psicen.htm

Luis E. Bastias  
   Contributions to the development of Valparaiso's Autopoiesis Theory
   http://www.bastias.luis.com