Fortran

The Temperature Dependent Effective Potentials (TDEP) code

Utility scripts and programs for VASP calculations

Soil and Water Assessment Tool +

The ECMWF wave model ecWAM

A library for directly calling PyTorch ML models from Fortran.

Multi Grid Large Eddy Turbulence

Next-Generation High-Fidelity CFD Solver

An open-source Python library interfacing the Fortran Spatially distributed Modeling and ASsimilation for Hydrology platform.

OpenRadioss is a powerful, industry-proven finite element solver for dynamic event analysis

PRIMA is a package for solving general nonlinear optimization problems without using derivatives. It provides the reference implementation for Powell's derivative-free optimization methods, i.e., COBYLA, UOBYQA, NEWUOA, BOBYQA, and LINCOA. PRIMA means Reference Implementation for Powell's methods with Modernization and Amelioration, P for Powell.

Official git repository of Elmer FEM software

Open Nodal Core Simulator

Semiempirical Extended Tight-Binding Program Package

Fast continuum solvation based on domain decomposition

Phantom Smoothed Particle Hydrodynamics and Magnetohydrodynamics code

Light-weight tight-binding framework

Fortran interfaces for ROCm libraries

This is the GitHub repository for STELLOPT, the state-of-the-art stellarator optimization code.

Quantum chemistry and solid state physics software package

Exascale multiphase flow solver — 2025 Gordon Bell Prize Finalist | 200T grid points on 43K+ GPUs

Fortran Standard Library

Library first implementation of the D3 dispersion correction

ADflow is a finite volume RANS solver tailored for gradient-based aerodynamic design optimization.

A parallel, open-source geothermal flow simulator

FLEXI: A high order discontinuous Galerkin framework for hyperbolic–parabolic conservation laws

Mirror of the Quantum ESPRESSO repository. Please do not post Issues or pull requests here. Use gitlab.com/QEF/q-e instead.

Full public release of large scale and linear scaling DFT code CONQUEST

Generally Applicable Atomic-Charge Dependent London Dispersion Correction

RTE+RRTMGP is a set of codes for computing radiative fluxes in planetary atmospheres.

NWChem: Open Source High-Performance Computational Chemistry

USGS Modular Hydrologic Model

This is the official GPL repository of the yambo code

Main repository for the NREL-supported OpenFAST whole-turbine and FAST.Farm wind farm simulation codes.

DFTB+ general package for performing fast atomistic simulations

The Framework for Aquatic Biogeochemical Models (FABM): a Fortran 2003 programming framework for biogeochemical models of marine and freshwater systems.

The official github mirror of the Abinit repository. We welcome bug fixes and improvements. Note that most of the active developments are hosted on our https://gitlab.abinit.org/ server. Before embarking on making significant changes, please contact the Abinit group. Note that questions will NOT be treated on github, please use the ABINIT Forum.

LAPACK development repository

SPLASH is an interactive visualisation and plotting tool using kernel interpolation, mainly used for Smoothed Particle Hydrodynamics simulations

Packmol - Initial configurations for molecular dynamics simulations

A Modern Fortran JSON API