The Vensim Website is a comprehensive resource for the Vensim System Dynamics simulation software.
The System Dynamics Society is an international non-profit organisation devoted to encouraging the development and use of systems thinking and system dynamics around the world.
UK Chapter of the System Dynamics Society
Tom Fiddaman's Page features models, links, and other useful information.
SEED Climate Bathtub Simulation an animated interactive bathtub stock/flow simulator on climate dynamics
InCoCo Project Website European Commission funded research project "Innovation, Coordination and Collaboration in Service Driven Manufacturing Supply Chains"