$\gamma$-Cascade: A Simple Program to Compute Cosmological Gamma-Ray
  Propagation
  Modeling electromagnetic cascades during gamma-ray transport is important in
many applications within astrophysics. This document introduces
$\gamma$-Cascade, a publicly available Mathematica package which allows users
to calculate observed gamma-ray fluxes from point sources as well as from a
distribution of sources. $\gamma$-Cascade semi-analytically computes the
effects of electromagnetic interactions during gamma-ray transport.
