] NetLogo is a programmable modeling environment for
] simulating natural and social phenomena. It is
] particularly well suited for modeling complex systems
] developing over time. Modelers can give instructions to
] hundreds or thousands of independent "agents" all
] operating in parallel. This makes it possible to explore
] the connection between the micro-level behavior of
] individuals and the macro-level patterns that emerge from
] the interaction of many individuals.

NetLogo User Manual