This page is for selected links to source code for or descriptions of applications written in Fortran. These might be examples of contemporary “real-world” programs, or educational older codes. There are thousands of currently active examples across the sciences.
http://www.easterbrook.ca/steve/?p=1558 discusses why a lot of climate models are written in Fortran.
This is 830k LOC
http://www.nemo-ocean.eu NEMO (Nucleus for European Modelling of the Ocean)
http://www.nemo-ocean.eu/content/download/250/1629/file/coding_rules_OPA9.pdf Their Fortran 95 Coding Rules.
http://www.giss.nasa.gov/tools/modelE/ The most recent GISS model.
http://ftp.giss.nasa.gov/pub/modelE/modelE1.tar.gz Source code.
http://igcmg.ipsl.jussieu.fr/Doc/IPSLCM4 IPSL Climate model documentation.
OFF an Open source Finite volumes Fluid dynamics code.
http://aa.usno.navy.mil/software/novas/novas_f/novasf_intro.phpNaval Observatory Vector Astrometry Software. Used to prepare the U.S. parts of The Astronomical Almanac.
Several versions of Zork were ported to Fortran:
And of course, Star Trek: