Center for Complex Systems Research, University of Illinois at Urbana Champaign  
   Research group which studies phenomena of multivariante systems with a large flow, such as turbulence, lightenings, and information flow on the internet.
   http://www.ccsr.uiuc.edu/

Center for Complex Systems & Brain Sciences, Florida University  
   . Multidisciplinary since its inception, the Center involves the cooperative efforts of neuroscientists, psychologists, mathematicians, physicists, computer scientists, and engineers.Founded in 1985
   http://www.ccs.fau.edu/

NESCI  
   New England Complex Systems Institute
   http://necsi.org/

Group of Nonlinear Dynamics and Synergetics, Slovenia  
   Applications to the cardiovascular system
   http://osc.fe.uni-lj.si/

Santa Fe Institute  
   Private, non-profit, multidisciplinary research and education center. New kind of scientific research community, pursuing emerging science.
   http://www.santafe.edu/

Center for the Study of Complex Systems, Michigan  
   seminars, workshops, education and research
   http://www.pscs.umich.edu/

Complexity On-line  
   Charles Sturt University, Australia Complexity On-line is a scientific information network about complex systems. You will find access to sites, publications (including the Complexity On-line Journal ) and other sources of interest.
   http://complex.csu.edu.au/complex/

VCU Complexity Research Group, Virginia  
   Influenced by the works of Robert Rosen* in theoretical biology, systems science and epistemology. .. Constructivism as a refreshing alternative
   http://views.vcu.edu/complex/

The Center for Connected Learning and Computer-Based Modeling  
   Connected Mathematics: Making Sense of Complex Phenomena Through Building Object-Based Parallel Models
   http://www.ccl.sesp.northwestern.edu/

UCL Centre for Nonlinear Dynamics, London  
   research in the theory of nonlinear dynamics and its applications across science and engineering
   http://www.ucl.ac.uk/CNDA/

Nonlinear and Complex Systems Lab. Korea  
   Resources on Nonlinear Dynamics and Complex Systems NCSL,
   http://www.ceptualinstitute.com/genre/NCSLdirectory.htm

Complex Systems in Argentina, Buenos AIRES  
   Applications to economics, Links to other universities and resources
   http://www.cea.uba.ar/aschu/complex.html

Centre for Policy Modelling, Manchester Metropolitan University, UK  
   "Simplicity is no reason, difficulty is no excuse." Publishers of the Journal of Memetics
   http://www.cpm.mmu.ac.uk/

Complex Systems Modeling, LANL, USA  
   The study of the dynamics of networks of agents at a US national laboratory.
   http://www.c3.lanl.gov/~rocha/complex/research.html

Complex Systems, Macedonia, Greece  
   description of courses, topics, links...
   http://www.it.uom.gr/pdp/DigitalLib/Complex/comp_res.htm

CSCO - Complex Systems Computation Group, Finland  
   Computational study of collection of simple interacting agents, ...
   http://www.cs.helsinki.fi/research/cosco/

Statistical Mechanics & Complex Systems, Texas, USA  
   E-prints and tutorials in chaos physics and other topics.
   http://order.ph.utexas.edu/

Complex Systems goroup at Academy of Finland  
   complex system is a collective consisting of a large number of individual components that interact in a strongly nonlinear fashion
   http://www.math.jyu.fi/research/cosa/cosa.html

Glushkov Cybernetic Centre, Kiev, Ukraine  
   GMDH for prediction, optimization, clustering, data mining ...
   http://www.gmdh.net/index.html

Complexity Research Programme  
   At the London School of Economics, UK.
   http://www.lse.ac.uk/LSE/COMPLEX/

Center for Nonlinear Studies  
   Group studying fundamentals and applications of nonlinear phenomena and complex systems. Located at Los Alamos National Laboratory.
   http://cnls.lanl.gov/

Duke Center for Nonlinear and Complex Systems  
   Interdisciplinary research at Duke University on nonlinear dynamics and emergent phenomona in complex systems.
   http://www.phy.duke.edu/cncs/index.shtml

Instituto Gulbenkian de Ciencia - Portugal  
   Development and evolution of complex systems in an organism centered approach.
   http://www.igc.gulbenkian.pt

Center for Nonlinear and Complex Systems - [Como, Italy  
   Classical and quantum dynamical systems.
   http://www.unico.it/~dysco/

Self-Organizing Systems  
   Tutorial on processes and patterns of organization and complexity in natural systems: complex adaptive systems, criticality, the edge of chaos. By Ethan Decker, University of New Mexico.
   http://www.ncst.ernet.in/kbcs/vivek/issues/13.1/sos/sos.html

The Plexus Institute  
   Application of Complex Systems to health care. Bibliography, news.
   http://www.plexusinstitute.org/

Centre For Nonlinear Studies  
   (UK) University of Leeds, Meetings, publications.
   http://www.maths.leeds.ac.uk/cnls/

Complexity Lab  
   At the Niels Bohr Institute and the Danish Technical University. Working on biophysics, turbulence, self-organised criticality and other complex systems.
   http://complexity.nbi.dk/

Complex Systems Research Center at New Hampshire, USA  
   Part of Institute for the Study of Earth, Oceans, and Space (EOS), investigates the effects of human disturbance on the Earth's biogeochemical processes. Part of Geo-Web ring.
   http://www.csrc.sr.unh.edu/

Genomelink Research Institute  
   Uses nonlinear dynamics and chaos to develop models and methods with special interest in studying numerical uncertainties. Applications include creating advanced algorithms for economics, microbiology, and quantum mechanics. Includes a list of research
   http://www.genomelink.org/

Complex Systems and Networks  
   CSN is a self-organized network of people spanning various academic units at Indiana University, interested in the broad areas of complex systems, network science, modeling, simulation, artificial life, and visualization.
   http://csn.indiana.edu/

Organizational theory of social networks, human social organizations  
   Home page of Douglas R. White, Anthropologist, at UC Irwine
   http://eclectic.ss.uci.edu/~drwhite/