CRPropa is a public astrophysical simulation framework for propagating extraterrestrial ultra-high energy particles. https://crpropa.github.io/CRPropa3/

The Cosmic Ray spectrum plot

Monte Carlo Simulation propagating charged Leptons through Media as C++ Library

HERMES is a publicly available computational framework for the line of sight integration over galactic radiative processes which creates sky maps in the HEALPix-compatibile format.

Software for a Raspberry Pi based muon detector system of the MuonPi project.

Lectures of Astroparticle Physics

A framework designed to simulate the signals produced by the secondary particles emerging from the interaction of the flux of primary cosmic ray with the atmosphere. These signals are simulated for any particle detector located at any place (latitude, longitude and altitude), including the real-time atmospheric, geomagnetic and detector conditions.

Dark Matter Simulation Code for Underground Scatterings - Crust Edition

Fermi-LAT analysis lesson with FermiPy

Visualization of cosmic rays propagating through the Earth's magnetic field

Unbinned likelihood analysis code for astroparticle physics datasets

Analysis pipeline capable of searching for dark compact objects in the Milky Way through astrometric lensing in real or mock Gaia DR4 data.

Dark Matter Simulation Code for Underground Scatterings

Deconvolution algorithms popular in Cherenkov astronomy

Curso de Astropartículas y Rayos Cósmicos

Database of published cosmic-ray energy spectra

Library to compute cross-sections and decay network of relevance for Galactic Cosmic Ray physics

Simulation of the detector for the GRAMS experiment

This library contains the p+p->gamma production cross sections implemented in Python, C/C++, Fortran and Matlab. For details, see Phys.Rev. D90 (2014) 12, 123014

SimProp is a Monte Carlo simulation code of ultra-high energy cosmic ray propagation.