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.
Fortran mimetic abstraction language
A Fortran 2023 correctness-checking framework supporting expressive idioms for writing assertions and tests
OpenRadioss is a powerful, industry-proven finite element solver for dynamic event analysis
An open-source Python library interfacing the Fortran Spatially distributed Modeling and ASsimilation for Hydrology platform.
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
Anura3D open source version to model large deformation and soil-water-structure interaction with the MPM.
Phantom Smoothed Particle Hydrodynamics and Magnetohydrodynamics code
The official repository for the Weather Research and Forecasting (WRF) model
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.
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
Main repository for the NREL-supported OpenFAST whole-turbine and FAST.Farm wind farm simulation codes.
RTE+RRTMGP is a set of codes for computing radiative fluxes in planetary atmospheres.
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.
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.
SPLASH is an interactive visualisation and plotting tool using kernel interpolation, mainly used for Smoothed Particle Hydrodynamics simulations
