  NuCraft (nucraft.hepforge.org) is an open-source Python project that
calculates neutrino oscillation probabilities for neutrinos from cosmic-ray
interactions in the atmosphere for their propagation through Earth. The
solution is obtained by numerically solving the Schr\"odinger equation. The
code supports arbitrary numbers of neutrino flavors including additional
sterile neutrinos, CP violation, arbitrary mass hierarchies, matter effects
with a configurable Earth model, and takes into account the production height
distribution of neutrinos in the Earth's atmosphere.
