The management school at the University of Mannheim maintains a web page describing their activities in system dynamics (in German): http://iswww.bwl.uni-mannheim.de/lehrstuhl/forschung/sd.htm
The Creative Learning Exchange is a non profit organization dedicated to the dissemination of material to improve learning in K-12 education and other education. To review their materials and publications list check out http://www.clexchange.org.
Tom Fiddaman of Ventana Systems, Inc. maintains a home page with example models and many links.
Homer Consulting, founded by Jack Homer, is another company that specializes in System Dynamics consulting.
Gene Bellinger, out of personal interest, maintains a site devoted to simulation and modeling, including system dynamics and a number of different approaches. This is a very worthwhile resource list. http://www.outsights.com/systems/welcome.htm
G.
Ossimitz maintains a large list of links to system dynamics resources.
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