JASS Journal  
   Journal of Applied Systems Studies - Methodologies and Applications for Systems Approaches.
   http://www.unipi.gr/jass/

ISSS: International Society for the Systems Sciences Homepage  
   
   http://WWW.ISSS.ORG/

System Dynamics Society  
   An international nonprofit organization devoted to encouraging the development and use of systems thinking and system dynamics around the world.
   http://www.albany.edu/cpr/sds/

International Federation for Systems Research  
   A non-profit, scientific and educational agency, constituted of member organizations from various countries. The overall purpose of the Federation is to advance cybernetic and systems research and systems applications and to serve the international system
   http://www.ifsr.org/

Institute for Systems Science  
   Located at the University of Linz, Austria. Teaching and research resources.
   http://www.sea.uni-linz.ac.at/

arXiv.org e-Print archive  
   The Los Alamos National Lab maintains a collections of e-prints dealing with nonlinear phenomena and others.
   http://xyz.lanl.gov/

Ilya Prigogine Center for Studies in Statistical Mechanics & Complex Systems  
   The Homepage of Ilya Prigogine Center at The University of Texas at Austin, with links to faculty and staff, e-prints, and tutorials in chaos physics and other topics
   http://order.ph.utexas.edu/

Centre for Systems Science  
   Focus is on computing science, microelectronics, system design, artificial intelligence, and robotics. Includes a list of staff and research partner associations. Located at Fraiser University, British Columbia, Canada.
   http://css.sfu.ca/

SIAM Activity Group on Dynamical Systems  
   Current conferences and topics related to dynamical systems.
   http://www.siam.org/siags/siagds.htm

Max-Planck-Institute for the Physics of Complex Systems  
   Dresden (Saxonia, Germany)
   http://www.mpipks-dresden.mpg.de/institut/index_en.html