Sedona is a code base primarily focused on calculating the radiation signatures of supernovae and other transient phenomena, designed to be run on a personal computer or cluster. It has functionality for hydrodynamic calculations via various solvers. Its radiation transport calculation is via an implicit Monte Carlo algorithm, which works fastest in non-diffusive regimes. See Kasen et al. (2006), Roth & Kasen (2014) for details.
To get started, read the documentation at https://dnkasen.github.io/sedona_documentation/ The documentation can be edited by modifying the .rst files the doc/sphinx_doc folder
You can find (some of the) development guidelines at https://github.com/dnkasen/sedona6/wiki/Developers-Guide.
To download additional atomic data, go to https://www.dropbox.com/sh/pw9ttd90w503vzq/AAD3H78_5dGSFCRgBoupg0Iva?dl=0