Hello, I have surveyed the field of ABM simulation software, and have finally decided I will either settle for Repast or Mason - both appeal to me: Repast because it is specifically designed to meet Social Simulation needs and seems to has a big following in the socsim community, and Mason because of it's design (on the code level). (lean and mean ;-) Has anybody tested both platforms and can offer some insight on the differences (I'm interested in _opinions_ :-))? I would need it to model cultural diffusion processes, my approach stems from viewing human societies as complex adaptive systems and special interest will be invested in modeling the cultural processes (either with cognitive agents, or "memetic" data structures or something in that direction). A good starting point seems to me the sugarscape model (I also want to include resources and competition between the agents). The agents should be adaptive in the long run (read: learning ability) - although this goes somewhat contrary to the keep it simple paradigm. There is an implementation for Repast, it is also listed on the Mason site as a project but I did not find a download. Basically, what I'm interested in is a very stable platform with an open community, and an ease of integrating other technologies (for instance BDI with Jason) Best Regards, Günther