http://www.mcell.cnl.salk.edu/
MCell, makes it possible to incorporate high resolution ultrastructure into models of ligand diffusion and signaling, and has evolved from experimental and theoretical work of the MCell gang: Joel Stiles (Biomedical Applications, Pittsburgh Supercomputing Center), Miriam Salpeter (Neurobiology & Behavior, Cornell University), Edwin Salpeter (Department of Physics and Astronomy, Cornell University), and Thomas Bartol and Terrence Sejnowski (Computational Neurobiology Laboratory, Salk Institute).