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Top Fortran GitHub Repositories (2026) · Open Source Projects

Explore top open source software built primarily with Fortran on GitHub. Ranked by live star growth, community adoption, and release activity.

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6 matching projects · updated Nov 14, 2026 How we rank ↗

#1 TRENDING cp2k/cp2k Fortran 2018

Quantum chemistry and solid state physics software package

◇ hpc ◇ material-science ◇ quantum-chemistry ◇ simulation

512 ↑ +1 today

#2 TRENDING grimme-lab/xtb Fortran 2019

Semiempirical Extended Tight-Binding Program Package

◇ atomistic-simulations ◇ computational-chemistry ◇ force-field ◇ quantum-chemistry

217 ↑ +1 today

#3 TRENDING astrofrog/fortranlib Fortran 2010

Collection of personal scientific routines in Fortran :book:

74 ↑ +1 today

#4 TRENDING mhoffman/kmos Fortran 2010

kMC on steroids: A vigorous attempt to make lattice kinetic Monte Carlo modelling easier

35 ↑ +1 today

#5 TRENDING fercook/ForMPS Fortran 2010

Fortran implementation of Matrix Product States algorithms

1 ↑ +1 today

#6 TRENDING ramos/minuit Fortran 2010

Mirror of the FORTRAN 77 version of the minuit minimisation library. Currently unmantained.

5 ↑ +1 today

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