VISNAP (irVIne coSmology aNAlysis Package) is a package of python modules for the analysis of simulation data saved under the IRATE (IRvine  Astorphysical simulaTion structurE) format.  VISNAP is being developed by the UC Irvine cosmology group, for questions contact: Miguel Rocha - rocham@uci.edu, Shea Garrison-Kimmel - sgarriso@uci.edu or Jose Onorbe - jonorbeb@uci.edu.