Dan Katz, from Michigan Political Science, the Center for the Study of Complex Systems, and Computational Legal Studies, is including a simulation platform that I wrote in NetLogo as part of the curriculum at the ICPSR (Inter-University Consortium for Political and Social Research) Summer Program in Quantitative Methods.
The simulation is designed to conduct simple game theoretic experiments on networks and provides wide capabilities to vary game structure and network architecture parameters. What features of networks promote cooperative behavior under various game theoretic conditions?
You can experiment with your own simulations on-line here. The NetLogo source code can be downloaded here. This off-line instantiation requires NetLogo 3.1.5, but should be easily updated for the latest NetLogo versions. A very basic single-sheet tutorial is available here. And finally, a piece of research conducted using the tool can be found here.