# Fortran project architecture examples

Interactive architecture diagrams of 60 open-source Fortran repositories with a GitDiagram architecture diagram, most stars first. Each diagram shows the project's main components, how they connect, and links every part to its file on GitHub.

## Repositories 1 to 50 of 60

1. [elmercsc/elmerfem](https://gitdiagram.com/elmercsc/elmerfem) (1.7k stars): Elmer FEM is a multiphysics finite-element suite. Markdown: https://gitdiagram.com/elmercsc/elmerfem.md
2. [wrf-model/wrf](https://gitdiagram.com/wrf-model/wrf) (1.7k stars): 1. Markdown: https://gitdiagram.com/wrf-model/wrf.md
3. [fortran-lang/stdlib](https://gitdiagram.com/fortran-lang/stdlib) (1.3k stars) Markdown: https://gitdiagram.com/fortran-lang/stdlib.md
4. [cp2k/cp2k](https://gitdiagram.com/cp2k/cp2k) (1.2k stars) Markdown: https://gitdiagram.com/cp2k/cp2k.md
5. [openfast/openfast](https://gitdiagram.com/openfast/openfast) (879 stars) Markdown: https://gitdiagram.com/openfast/openfast.md
6. [grimme-lab/xtb](https://gitdiagram.com/grimme-lab/xtb) (772 stars) Markdown: https://gitdiagram.com/grimme-lab/xtb.md
7. [mflowcode/mfc](https://gitdiagram.com/mflowcode/mfc) (425 stars) Markdown: https://gitdiagram.com/mflowcode/mfc.md
8. [m3g/packmol](https://gitdiagram.com/m3g/packmol) (347 stars) Markdown: https://gitdiagram.com/m3g/packmol.md
9. [ucns3d-team/ucns3d](https://gitdiagram.com/ucns3d-team/ucns3d) (344 stars) Markdown: https://gitdiagram.com/ucns3d-team/ucns3d.md
10. [nasa/cfl3d](https://gitdiagram.com/nasa/cfl3d) (334 stars) Markdown: https://gitdiagram.com/nasa/cfl3d.md
11. [mpas-dev/mpas-model](https://gitdiagram.com/mpas-dev/mpas-model) (294 stars) Markdown: https://gitdiagram.com/mpas-dev/mpas-model.md
12. [sundmanbo/opencalphad](https://gitdiagram.com/sundmanbo/opencalphad) (249 stars) Markdown: https://gitdiagram.com/sundmanbo/opencalphad.md
13. [extremeflow/neko](https://gitdiagram.com/extremeflow/neko) (245 stars) Markdown: https://gitdiagram.com/extremeflow/neko.md
14. [ncar/wrf_hydro_nwm_public](https://gitdiagram.com/ncar/wrf_hydro_nwm_public) (228 stars) Markdown: https://gitdiagram.com/ncar/wrf_hydro_nwm_public.md
15. [starlink/starlink](https://gitdiagram.com/starlink/starlink) (213 stars) Markdown: https://gitdiagram.com/starlink/starlink.md
16. [dssat/dssat-csm-os](https://gitdiagram.com/dssat/dssat-csm-os) (212 stars) Markdown: https://gitdiagram.com/dssat/dssat-csm-os.md
17. [xcompact3d/incompact3d](https://gitdiagram.com/xcompact3d/incompact3d) (211 stars) Markdown: https://gitdiagram.com/xcompact3d/incompact3d.md
18. [dftd4/dftd4](https://gitdiagram.com/dftd4/dftd4) (208 stars) Markdown: https://gitdiagram.com/dftd4/dftd4.md
19. [openmopac/mopac](https://gitdiagram.com/openmopac/mopac) (186 stars) Markdown: https://gitdiagram.com/openmopac/mopac.md
20. [horses-framework/horses3d](https://gitdiagram.com/horses-framework/horses3d) (163 stars) Markdown: https://gitdiagram.com/horses-framework/horses3d.md
21. [nasa/cea](https://gitdiagram.com/nasa/cea) (129 stars) Markdown: https://gitdiagram.com/nasa/cea.md
22. [noaa-gfdl/fms](https://gitdiagram.com/noaa-gfdl/fms) (121 stars) Markdown: https://gitdiagram.com/noaa-gfdl/fms.md
23. [ordern/conquest-release](https://gitdiagram.com/ordern/conquest-release) (118 stars) Markdown: https://gitdiagram.com/ordern/conquest-release.md
24. [thermotools/thermopack](https://gitdiagram.com/thermotools/thermopack) (103 stars) Markdown: https://gitdiagram.com/thermotools/thermopack.md
25. [uppasd/uppasd](https://gitdiagram.com/uppasd/uppasd) (100 stars) Markdown: https://gitdiagram.com/uppasd/uppasd.md
26. [mystransolver/mystransolver](https://gitdiagram.com/mystransolver/mystransolver) (98 stars) Markdown: https://gitdiagram.com/mystransolver/mystransolver.md
27. [ornl-cees/thermochimica](https://gitdiagram.com/ornl-cees/thermochimica) (69 stars) Markdown: https://gitdiagram.com/ornl-cees/thermochimica.md
28. [gotm-model/code](https://gitdiagram.com/gotm-model/code) (65 stars) Markdown: https://gitdiagram.com/gotm-model/code.md
29. [cambridgenuclear/scone](https://gitdiagram.com/cambridgenuclear/scone) (64 stars) Markdown: https://gitdiagram.com/cambridgenuclear/scone.md
30. [virtualplanetarylaboratory/atmos](https://gitdiagram.com/virtualplanetarylaboratory/atmos) (62 stars) Markdown: https://gitdiagram.com/virtualplanetarylaboratory/atmos.md
31. [ncar/cm1](https://gitdiagram.com/ncar/cm1) (58 stars) Markdown: https://gitdiagram.com/ncar/cm1.md
32. [li-cor-environmental/eddypro-engine](https://gitdiagram.com/li-cor-environmental/eddypro-engine) (56 stars) Markdown: https://gitdiagram.com/li-cor-environmental/eddypro-engine.md
33. [borgestassio/wind-turbine-control](https://gitdiagram.com/borgestassio/wind-turbine-control) (55 stars) Markdown: https://gitdiagram.com/borgestassio/wind-turbine-control.md
34. [dsi-llc/efdcplus8.5](https://gitdiagram.com/dsi-llc/efdcplus8.5) (55 stars) Markdown: https://gitdiagram.com/dsi-llc/efdcplus8.5.md
35. [dsi-llc/efdcplus_stable](https://gitdiagram.com/dsi-llc/efdcplus_stable) (51 stars) Markdown: https://gitdiagram.com/dsi-llc/efdcplus_stable.md
36. [qcxms/qcxms](https://gitdiagram.com/qcxms/qcxms) (49 stars) Markdown: https://gitdiagram.com/qcxms/qcxms.md
37. [gafusion/gacode](https://gitdiagram.com/gafusion/gacode) (42 stars) Markdown: https://gitdiagram.com/gafusion/gacode.md
38. [i-thompson/fresco](https://gitdiagram.com/i-thompson/fresco) (42 stars) Markdown: https://gitdiagram.com/i-thompson/fresco.md
39. [flexi-framework/galaexi](https://gitdiagram.com/flexi-framework/galaexi) (41 stars) Markdown: https://gitdiagram.com/flexi-framework/galaexi.md
40. [qianyesu/skyborn](https://gitdiagram.com/qianyesu/skyborn) (39 stars) Markdown: https://gitdiagram.com/qianyesu/skyborn.md
41. [cnes/radiativetransfercode-osoaa](https://gitdiagram.com/cnes/radiativetransfercode-osoaa) (37 stars) Markdown: https://gitdiagram.com/cnes/radiativetransfercode-osoaa.md
42. [takayuki-miyagi/nuhamil-public](https://gitdiagram.com/takayuki-miyagi/nuhamil-public) (37 stars) Markdown: https://gitdiagram.com/takayuki-miyagi/nuhamil-public.md
43. [jcsda/crtm](https://gitdiagram.com/jcsda/crtm) (36 stars) Markdown: https://gitdiagram.com/jcsda/crtm.md
44. [west-code-development/west](https://gitdiagram.com/west-code-development/west) (36 stars) Markdown: https://gitdiagram.com/west-code-development/west.md
45. [cambridge-iccs/fortran-tf-lib](https://gitdiagram.com/cambridge-iccs/fortran-tf-lib) (35 stars) Markdown: https://gitdiagram.com/cambridge-iccs/fortran-tf-lib.md
46. [dmftwdft/dmftwdft3](https://gitdiagram.com/dmftwdft/dmftwdft3) (34 stars) Markdown: https://gitdiagram.com/dmftwdft/dmftwdft3.md
47. [victorsndvg/fpl](https://gitdiagram.com/victorsndvg/fpl) (30 stars) Markdown: https://gitdiagram.com/victorsndvg/fpl.md
48. [acmusgrave/gridforminginverters](https://gitdiagram.com/acmusgrave/gridforminginverters) (26 stars) Markdown: https://gitdiagram.com/acmusgrave/gridforminginverters.md
49. [nuc-astro/winnet](https://gitdiagram.com/nuc-astro/winnet) (23 stars) Markdown: https://gitdiagram.com/nuc-astro/winnet.md
50. [jhuapl/kaiju](https://gitdiagram.com/jhuapl/kaiju) (20 stars) Markdown: https://gitdiagram.com/jhuapl/kaiju.md

Next page: https://gitdiagram.com/architecture-examples/fortran/2

More hubs: https://gitdiagram.com/architecture-examples

Counted over GitDiagram's stored diagrams of public repositories, from the names their components and groups carry and the files they link to; the rules are the ones in the [2026 open-source architecture report](https://gitdiagram.com/open-source-architecture-2026). Stars are GitHub's when the diagram was last made. Rebuilt daily: hubs grow as more repositories' languages are known.