Hello,
Here are Cygwin packages for the Swarm simulation system, a library that facilitates construction of agent-based models.
The packages are available here:
http://www.santafe.edu/~mgd/cygwin/swarm
Here's the setup.hint file:
category: Libs requires: blt tcltk libpng12 hdf5 gcc-objc cygwin sdesc: "Multi-agent simulation library" ldesc: "Swarm is a software package for multi-agent simulation of complex systems. The basic architecture of Swarm is the simulation of collections of concurrently interacting agents."