An early-stage HPC tensor and grid-kernel library for numerical relativity, focused on a SIMD-optimized (SSE/AVX/AVX2/AVX-512/Arm NEON), parallel implementation with OpenMP of the Z4c formulation of Einstein’s equations.

Package for data-driven and phenomenological gravitational waveform models

NRPyPN: Validated Post-Newtonian Expressions for Numerical Relativity

Port of GRChombo to AMReX - under development!

A translation of crucial parts of GRTL in torch for accelerated learning

Relativistic code for ADM/BSSN 3+1 decomposition, Analytical computes and Geodesics tracer over a Kerr/schwarzschild black holes and kdS/adS metrics

Simple codes to run 3+1 ADM and BSSN evolutions of Kasner initial data

Python Wrapper for GRChombo. Maintainers: @Masquerade0097 @spino17

An AMR-based open source code to evolve generalized Proca fields on arbitrary fixed backgrounds

Heron is a surrogate modelling toolkit for python, using Gaussian process regression.

CompactStar is a modular C++ framework for modeling neutron stars, hybrid stars, and exotic compact objects. It includes GR stellar-structure solvers (TOV + Hartle), thermal–chemical–spin evolution, baryon-number–violating (BNV) microphysics, and a full EOS engine for dense matter.

DIfferential Geometry with Python — see the package at the link below

Numerical Relativity Simulation with modified BSSN formulation. (Deprecated)

Tensorium_MLIR automatically generates solid metrics and initial conditions for numerical relativity, in a MLIR based compiler environment

Binary neutron star simulation with Einstein Toolkit and Lorene, including Psi4 waveform extraction, visualization, and result organization.

Generate critical spacetimes of spherically symmetric collapse. Serial Fortran implementation.

A toolkit of codes to generate, select and trace Lagrangian ejecta particles in the post-processing of GRMHD simulations. H5 files of the particles' trajectories, animations of their motion and .txt files ready to be inputted into nucleosynthesis networks can be produced with these codes.

Converting Mathematical Equations Like Tensorial Equations to C Programming Language. For example, in numerical relativity (NR), one can write Einstein's equations in C progrmming language.

A unified interface to various catalogs of Numerical Relativity simulations of compact binary mergers.

GRANITE (General-Relativistic Adaptive N-body Integrated Tool for Extreme Astrophysics) is an Open-source C++17 numerical relativity engine implementing CCZ4 spacetime evolution, Valencia GRMHD, and Berger-Oliger AMR. Self-directed learning project — currently under active development (v0.6.7). Open convergence issues documented.