I'm a Cosmologist using Numerical Relativity. My main repos are:
โจ aurel
This is a Python package to do relativistic calculations. Designed with ease of use in mind, it will automatically calculate any relativistic term your heart desires.
Thorns designed to set cosmological initial conditions ICPertFLRW & ICPertFLRW_GRH, use cosmological gauges CosmoLapse, and use cosmological triggers for adaptive mesh refinement AddRefinements.