For download of FAST, go to: 

For FAST Source codes the link is

For FAST example movies the link is

For FAST development versions the link is

For figure explanation, see:    

Aksel, T., Choe Yu, E., Sutton,S., Ruppel, K.M. and Spudich, J.A. (2015).  Ensemble Force Changes that Result from Human Cardiac Myosin Mutations and a Small-Molecule Effector.  Cell Reports 11:910-920.