NetLogo
NetLogo Site
NetLogo is a multi-agent programmable modeling environment. It is used by tens of thousands of students, teachers and researchers worldwide. It also powers HubNet participatory simulations. It is authored by Uri Wilensky and developed at the CCL. You can download it free of charge, and learn much more on NetLogo's website.
NetLogo Forum
The official online community space for NetLogo users. Teachers, students, academics, professionals, amateurs - we welcome everyone to participate in it. You can send in bug reports, feature request, share your projects or models, or ask and answer questions.