  The Nancy Grace Roman Space Telescope Coronagraph Instrument (CGI) will be
capable of characterizing exoplanets in reflected light and will demonstrate
space technologies essential for future missions to take spectra of Earthlike
exoplanets. As the mission and instrument move into the final stages of design,
simulation tools spanning from depth of search calculators to detailed
diffraction models have been created by a variety of teams. We summarize these
efforts, with a particular focus on publicly available datasets and software
tools. These include speckle and point-spread-function models, signal-to-noise
calculators, and science product simulations (e.g. predicted observations of
debris disks and exoplanet spectra). This review is intended to serve as a
reference to facilitate engagement with the technical and science capabilities
of the CGI instrument.
