Trending Fortran repositories on GitHub — ranked by total activity score (stars, forks, pushes, PRs) over the past month.
CEA computes the equilibrium composition of mixtures via free-energy minimization, and uses the resulting product concentrations to determine thermodynamic and transport properties. It includes a large database of species with thermodynamic curve-fit data, and can be used for rocket performance, detonation parameters, and shock-wave analysis.
Multi-GPU code for intreface-resolved simulations of multiphase turbulence (triply periodic box and channel). DNS of Navier-Stokes equations coupled with a phase-field method (ACDI) for interface description. The cuDecomp library is used for parallelization.
Thermodynamic Equations of State, Fortran library with both automatic and anallytical derivation capabilities
Abaqus/Standard user element subroutine (UEL) for small strain isotropic linear elastostatics using standard displacement formulation.
OpenRadioss is a powerful, industry-proven finite element solver for dynamic event analysis
A deep learning library for use in high-performance computing applications in modern Fortran
High Order Hex-Quad Mesh (HOHQMesh) package to automatically generate all-quadrilateral meshes with high order boundary information.
Exascale multiphase flow solver — 2025 Gordon Bell Prize Finalist | 200T grid points on 43K+ GPUs
HORSES3D: A high-order discontinuous Galerkin solver for flow simulations and multi-physics applications
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.
Düsseldorf Advanced Material Simulation Kit (Read-only mirror)
Main repository for the NREL-supported OpenFAST whole-turbine and FAST.Farm wind farm simulation codes.
The official repository for the Weather Research and Forecasting (WRF) model
Mirror of the Quantum ESPRESSO repository. Please do not post Issues or pull requests here. Use gitlab.com/QEF/q-e instead.
Flatiron Institute Fast Multipole Libraries --- This codebase is a set of libraries to compute N-body interactions governed by the Laplace and Helmholtz equations, to a specified precision, in three dimensions, on a multi-core shared-memory machine.
PICLas is a parallel, three-dimensional PIC-DSMC solver developed cooperatively by the Institute of Space Systems, Institute of Aerodynamics and Gas Dynamics at the University of Stuttgart and the spin-off boltzplatz. PICLas is a flexible particle-based plasma simulation suite.
(REOS) Radar and ElectroOptical Simulation Framework written in Fortran.
The official OpenMolcas repository is at https://gitlab.com/Molcas/OpenMolcas, this is only a mirror. OpenMolcas is a quantum chemistry software package. The key feature of OpenMolcas is the multiconfigurational approach to the electronic structure.
An easy to follow library to make Fortran easier in general with wrapped interfaces, sorting routines, kD-Trees, and other algorithms to handle scientific data and concepts. The library contains core fortran routines and object-oriented classes.
