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A curated list of awesome FORTRAN 77 resources

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# Awesome FORTRAN 77 [![Awesome](https://awesome.re/badge.svg)](https://awesome.re)

A curated list of awesome FORTRAN 77 libraries, tools, and resources.

## Contents

* [Compilers](#compilers)
    + [Free Compilers](#free-compilers)
    + [Commercial Compilers](#commercial-compilers)
    + [Translators](#translators)
    + [Pre-Processors](#pre-processors)
    + [Code Generators](#code-generators)
  * [Codes](#codes)
    + [Repositories & Directories](#repositories--directories)
    + [Numerical Codes](#numerical-codes)
    + [Computer Science](#computer-science)
    + [Cryptography](#cryptography)
    + [Pseudo-Random Number Generators](#pseudo-random-number-generators)
    + [Graphics, Plotting, User Interfaces](#graphics-plotting-user-interfaces)
    + [Message Passing](#message-passing)
    + [Databases](#databases)
    + [CGI](#cgi)
    + [Serialisation](#serialisation)
    + [System](#system)
  * [Utilities](#utilities)
  * [Source Code Documentation](#source-code-documentation)
  * [Static Code Analysis](#static-code-analysis)
  * [Benchmarks](#standards)
  * [Editors & IDEs](#editors--ides)
  * [Language, FAQs, Tutorials](#language-faqs-tutorials)
    + [Introduction](#introduction)
    + [Coding Style](#coding-style)
    + [Standards](#standards)
    + [Transition to Modern Fortran](#transition-to-modern-fortran)
  * [Free Books](#free-books)
  * [Games](#games)
  * [Humor](#humor)

## Compilers

### Free Compilers

* [BC-FORTRAN 77](https://ftp.sunet.se/mirror/archive/ftp.sunet.se/pub/simtelnet/msdos/fortran/bcf7713b.zip)
    (DOS) – Freeware compiler/linker, supporting the ANSI/ISO FORTRAN 77
    language standard only. Written by Andre Koestli.
  * [DJGPP](https://www.delorie.com/djgpp/)
    (DOS) – 32-bit C/C++ and Fortran development environment for Intel 80386 PCs
    running DOS.
  * [g77](http://www.kilmnj.com/g77/)
    (DOS, Win32, Linux, UNIX) – The open-source FORTRAN 77 compiler of the GNU
    Compiler Collection (GCC) prior version 4.0. Has been replaced by GNU
    Fortran since then. Available for Win32 through MinGW or Cygwin.
  * [lcc-win32](https://web.archive.org/web/20200221163042/http://mermaja.act.uji.es/docencia/is37/data/LCC/LCC-Win32.html)
    (Win32) – C and FORTRAN development environment, by Jacob Navia.
  * [Open Watcom FORTRAN 77](http://www.openwatcom.com/)
    (DOS, OS/2, Win32, Linux) – Multi-platform open-source compiler, based on
    the commercial Watcom FORTRAN 77. Includes the DOS/4GW 32-bit DOS extender
    with run-time and virtual memory support up to 32 MiB.

### Commercial Compilers

* [Absoft ProFortran F77](https://web.archive.org/web/20000706211705/http://www.absoft.com/)
    (DOS, Win32, MacOS 7.5, Linux) – Full ANSI/ISO FORTRAN 77 compiler with
    VAX/VMS language extensions; Cray pointers; Sun, IBM, and HP extensions; and
    LS Fortran language extensions.
  * [Apogee-FORTRAN 77](https://web.archive.org/web/19990221061617/http://www.apogee.com/page11.html)
    (UNIX) – Supports almost all language extensions found in Sun, VAX/VMS,
    Cray, and MIL-STD 1753 FORTRAN 77.
  * [Fujitsu Fortran](https://web.archive.org/web/20000305112103/http://www.tools.fujitsu.com/linux/index.shtml)
    (Linux) – Fortran 90/95 compiler with FORTRAN 77 support.
  * [Lahey F77L3-EM/32](https://web.archive.org/web/19980523094643/http://www.lahey.com/em32.htm)
    (DOS) – Highly optimised 32-bit FORTRAN 77 compiler for DOS that supports
    the full ANSI standard and the most popular DEC VAX, IBM VS, and Fortran 90
    features. Includes a basic graphics library. The more advanced Graphoria
    library was sold separately.
  * [Microsoft FORTRAN 5.1](https://winworldpc.com/product/microsoft-fortran/5x)
    (DOS, OS/2, Win16) – Microsoft’s implementation of a FORTRAN 77 compiler.
    The compiler provides its own `HIMEM.SYS` to access up to 16 MiB of real
    memory.
  * [Microway NDP Fortran](https://web.archive.org/web/19980120153749/http://www.microway.com/ndpfort.html)
    (DOS, Win32, OS/2, Linux, UNIX) – Globally optimising VMS-compatible
    compiler that supports Intel, Cyrix, and Weitek co-processors. Full FORTRAN
    77 support with DOD, FORTRAN 66, BSD4.2, and VMS extensions. Linkable with
    NDP C/C++/Pascal. Includes linker, DOS extender, and librarian.
  * [Prospero Pro Fortran-77](https://web.archive.org/web/20040415132626/http://www.prosperosoftware.com/f2iix.html)
    (DOS, OS/2) – FORTRAN 77 development environment that includes compiler,
    linker, librarian, source level debugger and IDE. The F77PC Graphics BIOS
    Library even provides “turtle graphics”, better known from the Logo
    programming language. Prospero also published FORTRAN 77 compilers for Atari
    ST, OS/2, and Sinclair QL. An optional DOS Extender Kit was available. The
    PC version was supported until 2003.
  * [Ryan-McFarland RM/FORTRAN](https://vetusware.com/download/RMFORTRAN%202.43/?id=9864)
    (DOS) – Supports the full ANSI FORTRAN 77 standard and includes popular
    extensions from VAX, VS, and FORTRAN 66. Featured code optimisation and
    floating-point co-processor support/emulation.
  * [Salford FTN77](https://www.silverfrost.com/53/ftn77_personal_edition.aspx)
    (DOS, Win32, UNIX) – The FTN77 compiler uses the Salford-developed DBOS
    extender. Later versions of FTN77 were ported to Win32 and UNIX. A personal
    edition is available free of charge.
  * [SNI F77](https://web.archive.org/web/19970210142028/http://www.linuxland.de/fortran/fortran.html)
    (Linux) – Optimised compiler for Intel 486/586/686, developed by Siemens
    Nixdorf Informationssysteme.
  * [Sun WorkShop Compiler FORTRAN 77](https://web.archive.org/web/19970803185812/http://www.sun.com/workshop/literature/ProductGuide/SWP.SW/PWSF_tech.html)
    (UNIX) – ANSI FORTRAN 77 compiler, with VMS, Cray, and MIL-STD 1753
    extensions; POSIX binding; and interlanguage calling (C, C++, Pascal, Ada).
  * [The Portland Group PGF77 Workstation](https://web.archive.org/web/20000815200338/http://www.pgroup.com/prodworkpgf77.htm)
    (Win32, Linux, UNIX) – SMP-parallel FORTRAN 77 compiler for Intel Pentium
    Pro processors.
  * [Watcom FORTRAN 77](https://web.archive.org/web/19970719190132/http://www.powersoft.com/products/languages/fort77.html)
    (DOS, OS/2, Win16, Win32) – 32-bit protected-mode compiler that supports up
    to 4 GiB memory. Run-time compatible with Watcom C. Includes source-level
    debugger, full ANSI FORTRAN 77 language support plus extensions, profiler,
    IBM SAA compatibility, linker, librarian, and make utility. Requires 386/486
    and DOS extender. In 2003, the compiler was made available free of charage
    as Open Watcom.
  * [Watcom WATFOR-77](https://archive.org/details/watcom-watfor-77)
    (DOS) – FORTRAN 77 compiler for MS-DOS PCs with 8087/80287 floating point
    co-processors.

### Translators

* [C2F](https://web.archive.org/web/20100328094906/http://home.earthlink.net/~dave_gemini/)
    (Win32) – David Frank’s C to FORTRAN 77 translator.
  * [f2c](http://www.netlib.org/f2c/)
    (DOS, Win32, Linux, UNIX) – An open-source FORTRAN 77-to-C transpiler. The
    output can be compiled with any K&R or ANSI C compiler.
    [Mac F2C](https://web.archive.org/web/20040404090614/http://www.alumni.caltech.edu/~igormt/Mac_F2C.html)
    is a version for Mac OS.
  * [f2cl](https://github.com/rtoy/f2cl)
    – A FORTRAN 77 to Common Lisp translator.
  * [f2cpp](https://github.com/victorliu/f2cpp)
    – Perl script to convert FORTRAN 77 to C++ (requires GNU Fortran runtime).
  * [f2go](https://github.com/Konstantin8105/f4go)
    – FORTRAN 77-to-Go translator.
  * [f2j](https://www.netlib.org/java/f2j/)
    – FORTRAN 77-to-Java converter.
  * [f2j](https://web.archive.org/web/20040220231611/http://www.npac.syr.edu/projects/pcrc/f2j.html)
    – Another FORTRAN 77-to-Java converter of the same name.
  * [F2perl](https://f2perl.sourceforge.net/)
    – Perl script to translate FORTRAN 77 into Perl.
  * [F2PY](https://numpy.org/doc/stable/f2py/)
    – Fortran to Python interface generator.
  * [f2what](https://sourceforge.net/projects/f2what/)
    – Project to translate algorithmic Fortran to a variety of languages (Java,
    .NET, and VBA so far). It offers a FORTRAN 77 parser with code
    transformations, variable disambiguation, and modular output to other
    programming languages.
  * [ForToPas](https://sourceforge.net/projects/fortran2pascal/)
    – A Fortran to Pascal (Delphi) converter.

## Pre-Processors

* [Ratfor](https://github.com/slattarini/ratfor)
    – Translates programs written in the Ratfor language into FORTRAN 77
    programs. Originally developed by B. Kernighan and P. J. Plauger.

## Code Generators

* [avr-gfortran](https://sourceforge.net/projects/avr-gfortran/)
    – Pseudo-FORTRAN 77 compiler for Atmel AVR microcontrollers, written in
    Fortran using GNU Fortran.

## Codes

### Repositories & Directories

* [Computer Physics Communications Program Library](https://www.cs.qub.ac.uk/)
    – Almost 2000 programs in computational physics and chemistry.
  * [Fast Fourier Transforms](https://web.archive.org/web/20110823110138/http://faculty.prairiestate.edu/skifowit/fft/)
    – FFT packages and routines for FORTRAN.
  * [GAMS](https://gams.nist.gov/)
    – Repository of mathematical and statistical software components of use in
    computational science and engineering.
  * [John Burkardt](https://people.sc.fsu.edu/~jburkardt/f77_src/f77_src.html)
    – Collection of FORTRAN 77 software
    ([GitHub](https://github.com/johannesgerer/jburkardt-f77)).
  * [NCAR’s Mathematical and Statistical Libraries](https://web.archive.org/web/20050211013748/http://www.scd.ucar.edu/softlib/mathlib.html)
    – Collection of mathematical and statistical software in FORTRAN 77.
  * [NSWC Library of Mathematics Subroutines](https://github.com/jacobwilliams/nswc)
    – Subroutines by the Naval Surface Warfare Center
    ([description](https://apps.dtic.mil/dtic/tr/fulltext/u2/a261511.pdf)).
  * [Netlib](http://www.netlib.org/)
    – Collection of mathematical software.
  * [Prof. Klaus Schittkowski](https://web.archive.org/web/20130509064145/http://www.ai7.uni-bayreuth.de/software.htm)
    – Interactive optimization environments, nonlinear optimization solvers,
    least squares and data fitting solvers, and more.
  * [StatCodes](https://web.archive.org/web/20050618085504/http://www.astro.psu.edu/statcodes/)
    – Metasite with links to source codes implementing statistical methods which
    are freely available on the Internet.

### Numerical Codes

* [ADIFOR](https://www.mcs.anl.gov/research/projects/adifor/)
    – Automatic differentiation of FORTRAN 77 programs.
  * [ALFPACK](https://web.archive.org/web/20050207230333/http://www.scd.ucar.edu/softlib/ALFPACK.html)
    – Legendre functions of first kind.
  * [ARPACK](https://www.caam.rice.edu/software/ARPACK/)
    – Collection of FORTRAN 77 subroutines designed to solve large scale
    eigenvalue problems.
  * [ARPACK-NG](https://github.com/opencollab/arpack-ng)
    – Replacement of ARPACK.
  * [ASAD](https://web.archive.org/web/20060113132300/www.atm.ch.cam.ac.uk/acmsu/asad/index.html)
    – Software package developed for creating and integrating chemistry schemes
    in atmospheric models without the need to write any FORTRAN code to solve
    the chemical rate equations.
  * [ATLAS](http://math-atlas.sourceforge.net/)
    – Optimised BLAS implementation.
  * [Aztec](http://www.cs.sandia.gov/CRF/aztec1.html)
    – An iterative sparse linear solver package.
  * [BIFPACK](http://www.bifurcation.de/software.html)
    – Package for bifurcation, continuation and stability analysis.
  * [BLAS](http://www.netlib.org/blas/)
    – Reference implementation of the Basic Linear Algebra Subprograms.
  * [BiM](http://web.math.unifi.it/users/brugnano/BiM/index.html)
    – Implements a variable order-variable stepsize method for (stiff) initial
    value problems for ODEs.
  * [CERNLIB](https://cernlib.web.cern.ch/cernlib/)
    – CERN general-purpose program library.
  * [CHOL-REV](https://github.com/imurray/chol-rev)
    – Reverse-mode routine written in FORTRAN 77 which uses blocked level-3
    BLAS routines.
  * [CMLIB](https://gams.nist.gov/cgi-bin/serve.cgi/Package/CMLIB/)
    – NIST core math library.
  * [DAEPAK](http://www.netlib.org/contin/manpak/)
    – Differential algebraic equations.
  * [DASPK](http://www.netlib.org/ode/)
    – Differential-algebraic system solver (BDF/Krylov method).
  * [DATAPAC](https://www.nist.gov/itl/sed/datapac)
    – FORTRAN 77 statistical library, by James Filliben (NIST).
  * [DCDFLIB](https://biostatistics.mdanderson.org/SoftwareDownload/SingleSoftware/Index/21)
    – Cumulative distribution functions, inverses, and parameters for common
    statistical distributions.
  * [DEGAS 2](https://w3.pppl.gov/degas2/)
    – Monte Carlo code for studying neutral transport in plasmas, with emphasis
    on fusion applications.
  * [Efficient sorting routines in FORTRAN 77](https://github.com/ivan-pi/hs-sort)
    – Sorting routines in FORTRAN 77 by G. T. Houlsby and S. W. Sloan.
  * [EIGENTRI](http://calgo.acm.org/)
    – Set of Fortran programs for reducing a nonsymmetric matrix to tridiagonal
    form, computing the eigenvalues of the tridiagonal matrix, improving the
    accuracy of an eigenvalue, and computing the corresponding eigenvector.
  * [EISPACK](http://www.netlib.org/eispack/)
    – Collection of FORTRAN 77 subroutines that compute the eigenvalues and
    eigenvectors. Superseded by LAPACK.
  * [EMMIX](https://people.smp.uq.edu.au/GeoffMcLachlan/emmix/emmix.html)
    – Program to fit a mixture model of multivariate normal or t-distributed
    components to a given data set.
  * [Expokit](http://www.maths.uq.edu.au/expokit/)
    – Software package that provides matrix exponential routines for small dense
    or very large sparse matrices.
  * [FFTPACK](https://www2.cisl.ucar.edu/resources/legacy/fft5)
    – FORTRAN 77 library of fast Fourier transforms.
  * [FISHPAK](https://web.archive.org/web/20040303192401/http://www.scd.ucar.edu/css/software/fishpack/)
    – Subprograms for the solution of separable elliptic PDEs.
  * [FMLIB](https://web.archive.org/web/20040415231733/http://www.lmu.edu/acad/personal/faculty/dmsmith2/FMLIB.html)
    – Package of FORTRAN routines for multiple precision computation.
  * [FMM](http://www.netlib.org/fmm/index.html)
    – Routines from the book *Computer Methods for Mathematical Computations*,
    by Forsythe, Malcolm, and Moler (1977).
  * [GeographicLib](https://geographiclib.sourceforge.io/Fortran/doc/index.html)
    – Geodesic routines implemented in FORTRAN 77.
  * [GSLIB](http://www.statios.com/GSLIB/index.html)
    – Geostatistical Software Library. Collection of geostatistical programs
    developed at Stanford University.
  * [GWMFE](https://github.com/mfeproject/legacy-gwmfe)
    – 1D and 2D gradient-weighted moving finite element codes.
  * [HSL](http://www.hsl.rl.ac.uk/archive/index.html)
    – Collection of FORTRAN codes for large scale scientific computation.
  * [HSL (Harwell Subroutine Library)](https://web.archive.org/web/20020820093441/http://www.cse.clrc.ac.uk/Activity/HSL)
    – Collection of ISO FORTRAN 77 subprograms for large scale scientific
    computation.
  * [IMSL](https://web.archive.org/web/20010405123018/http://www.vni.com/products/imsl/imslfort.html)
    – More than 900 FORTRAN 77 subroutines for use in general applied
    mathematics, statistical data analysis and presentation in scientific and
    business applications (commercial).
  * [IRBEM-LIB](https://github.com/PRBEM/IRBEM)
    – Provides routines to compute magnetic coordinates for any location in the
    Earth’s magnetic field, to perform coordinate conversions, to evaluate
    geophysics/space-physics models, and to propagate orbits in time.
  * [ITPACK](http://www.netlib.org/itpack/)
    – Subroutines for solving large sparse linear systems by iterative methods.
  * [JTPACK77](https://web.archive.org/web/20140805011056/http://turner-family.com:80/John/LANL/JTpack.html)
    – Various FORTRAN routines, with BLAS/LAPACK-like functionality.
  * [LAIPE](http://www.equation.com/servlet/equation.cmd?fa=laipe)
    – High-performance package of parallel direct solvers.
  * [LANCELOT](http://www.numerical.rl.ac.uk/lancelot/lancelot.html)
    – Standard FORTRAN 77 package for solving large-scale nonlinearly
    constrained optimisation problems.
  * [LAPACK](http://www.netlib.org/lapack/)
    – Subroutines for solving systems of simultaneous linear equations,
    least-squares solutions of linear systems of equations, eigenvalue problems,
    and singular value problems.
  * [LINPACK](http://www.netlib.org/linpack/)
    – Collection of Fortran subroutines that analyse and solve linear equations
    and linear least-squares problems. Superseded by LAPACK.
  * [MCLUST/EMCLUST](https://web.archive.org/web/20041207003625/http://www.stat.washington.edu/fraley/mclust/soft.shtml)
    – Model-based clustering and discriminant analysis, including hierarchical
    clustering and EM for parameterized Gaussian mixtures and Poisson noise.
  * [MCHF](https://github.com/atsp-org/atsp)
    – Multi-configuration Hartree-Fock (MCHF) atomic-structure package that
    determines radial functions that define the orbitals of configuration states
    in the expansion of a non-relativistic wave function of a many-electron
    system.
  * [MGMPI](https://web.archive.org/web/20050405232502/http://cosmos.ucsd.edu/mgmpi/index-home.html)
    – Parallel multigrid solver for 3D elliptic problems.
  * [MINPACK](http://www.netlib.org/minpack/)
    – Subroutines for solving nonlinear equations and nonlinear least squares
    problems.
  * [MINUIT](https://github.com/ramos/minuit)
    – Numerical minimisation program, by CERN.
  * [MISCLIB](https://biostatistics.mdanderson.org/SoftwareDownload/SingleSoftware/Index/87)
    – Miscellaneous FORTRAN routines for statistical software.
  * [MPFUN77](https://www.netlib.org/mpfun/)
    – Multiple precision arithmetic in FORTRAN 77.
  * [MUDPACK](https://web.archive.org/web/20070607150336/http://www.cisl.ucar.edu/css/software/mudpack/)
    – Multigrid software for elliptic PDEs.
  * [NCARM](https://web.archive.org/web/20050204103302/http://www.scd.ucar.edu/softlib/NCARM.html)
    – Non-portable math library that is very Cray parallel-vector specific, and
    dates back to the mid-1970s.
  * [ODEPACK](https://people.sc.fsu.edu/~jburkardt/f77_src/odepack/odepack.html)
    – FORTRAN 77 library which implements a variety of solvers for ODEs.
  * [PIM](https://web.archive.org/web/19991001072853/http://www.mat.ufrgs.br/%7Erudnei/pim/pim-i.html)
    – Collection of FORTRAN 77 routines designed to solve systems of linear
    equations (SLEs) on parallel computers using a variety of iterative methods.
  * [PSIDE](https://web.archive.org/web/19991006225752/https://www.cwi.nl/cwi/projects/PSIDE/)
    – Parallel software for implicit differential equations.
  * [QUADPACK](http://www.netlib.org/quadpack/index.html)
    – Subroutine package for the numerical computation of definite
    one-dimensional integrals.
  * [REGRIDPACK](https://web.archive.org/web/20041214084306/http://www.scd.ucar.edu/softlib/REGRIDPACK.html)
    – FORTRAN 77 routines for interpolating values between one-, two-, three-,
    and four-dimensional arrays defined on uniform or nonuniform orthogonal
    grids.
  * [SCILIB](http://www.netlib.org/scilib/)
    – Portable FORTRAN emulation of Cray SCILIB.
  * [SLATEC](http://www.netlib.org/slatec/)
    – Comprehensive software library containing over 1400 general purpose
    mathematical and statistical routines written in FORTRAN 77.
  * [SLEIGN2](http://www.math.niu.edu/SL2/)
    – Sturm-Liouville problems.
  * [SLICOT](http://slicot.org/)
    – Provides FORTRAN 77 implementations of numerical algorithms for
    computations in systems and control theory.
  * [SPARSEKIT](https://www-users.cs.umn.edu/~saad/software/SPARSKIT/)
    – Basic tool-kit for sparse matrix computations.
  * [SPBLAS](https://math.nist.gov/spblas/original.html)
    – Sparse matrix computational kernels.
  * [SPECFUN](https://www.netlib.org/specfun/)
    – Library that include Bessel functions, exponential integrals, error and
    error-related functions, and gamma and gamma-related functions. Replaces the
    old AMOSLIB and FUNPACK.
  * [SPHEREPACK](https://web.archive.org/web/20051107222328/http://www.scd.ucar.edu/css/software/spherepack/)
    – Collection of FORTRAN programs that facilitates computer modeling of
    geophysical processes.
  * [STARPAC](https://water.usgs.gov/software/OTIS/addl/starpac/nls.html)
    – Time-series and regressions package.
  * [StatLib](http://ftp.uni-bayreuth.de/math/statlib/apstat/index)
    – Collection of algorithms published in the journal *Applied Statistics*
    between 1968 and 1994, mostly in FORTRAN (AS1 – AS319).
  * [STSPACK](https://www.nist.gov/itl/sed/stspac-charlie-reeve-subroutines)
    – FORTRAN 77 statistical library, by Charlie Reeves (NIST).
  * [Timeslap](https://github.com/Beliavsky/Timeslab)
    – Time series analysis package by H. Joseph Newton to accompany his book
    “Timeslab: A Time Series Analysis Laboratory” (1988).
  * [Tinker](https://dasher.wustl.edu/tinker/)
    – General package for molecular mechanics and dynamics, with some special
    features for biopolymers.
  * [TLCPACK](https://web.archive.org/web/20050309013545/http://www.scd.ucar.edu/softlib/TLCPACK.html)
    – Suite of FORTRAN 77 routines for interpolating values between one-, two-,
    three-, and four-dimensional arrays defined on uniform and nonuniform
    orthogonal grids.
  * [TOMS](http://www.netlib.org/toms/)
    – Collected algorithms of the ACM.
  * [TRNFSP3N](https://github.com/Geo-Linux-Calculations/trnfsp3n)
    – FORTRAN 77 source code for transforming GPS orbit files in SP3 format
    between different realisations of ITRFs.
  * [UMFPACK](https://web.archive.org/web/20041209062517/http://www.cise.ufl.edu/research/sparse/umfpack/)
    – Set of routines for solving unsymmetric sparse linear systems.
  * [WSMP](https://researcher.watson.ibm.com/researcher/view_group.php?id=1426)
    – A collection of algorithms for efficiently solving large sparse systems of
    linear equations.

### Computer Science

* [Genetic Algorithm (GA) Driver](https://web.archive.org/web/19990427170837/http://www.staff.uiuc.edu/%7Ecarroll/ga.html)
    – FORTRAN 77 implementation of a genetic algorithm driver program that
    provides an environment (function) in which a population must evolve, by
    David L. Carroll.

### Cryptography

* [Fortran77-Enigma](https://github.com/barrettotte/Fortran77-Enigma)
    – Enigma machine emulator in FORTRAN 77.
  * [Lucifer](https://github.com/interkosmos/lucifer)
    – Implementation of Arthur Sorkin’s variant of the Lucifer block cipher, a
    direct predecessor of DES, ported from FORTRAN IV to FORTRAN 77.

### Pseudo-Random Number Generators

* [ACORN](http://acorn.wikramaratna.org/download.html)
    – Original FORTRAN 77 version of the *Additive Congruential Random Number*
    (ACORN) generator, by R. S. Wikramaratna.
  * [Mersenne Twister](http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/VERSIONS/FORTRAN/fortran.html)
    – Various adaptions of the Mersenne Twister (MT19937), collected by Makoto
    Matsumoto.
  * [Park–Miller](https://web.archive.org/web/20060303093233/https://www.cisl.ucar.edu/zine/96/spring/articles/3.random-6.html)
    – FORTRAN 77 adaption of the “Integer Version 2” PRNG, originally written by
    Steven K. Park and Keith W. Miller in Pascal.
  * [RANARRAY](https://www-cs-faculty.stanford.edu/~knuth/programs.html)
    – Portable random number generator.
  * [RANLIB](https://people.sc.fsu.edu/~jburkardt/f77_src/ranlib/ranlib.html)
    – General random number generators.
  * [RANLUX](http://www.astro.multivax.de:8000/helbig/fortran/ranlux.html)
    – Subtract-and-borrow random number generator proposed by Marsaglia and
    Zaman.

### Graphics, Plotting, User Interfaces

* [Accis](https://github.com/ihutch/accis)
    – Plotting routines for Fortran, by Ian Hutchinson.
  * [DISLIN](http://www.dislin.de/)
    – Free high-level scientific plotting library.
  * [DRAWCGM](https://web.archive.org/web/20050418002941/http://www.psc.edu/general/software/packages/drawcgm/drawcgm.html)
    – Package of FORTRAN and C routines which can be used to create CGM
    metafiles.
  * [EGGX/ProCALL](https://www.ir.isas.jaxa.jp/~cyamauch/eggx_procall/)
    – X11 graphics library for C and FORTRAN.
  * [Fastgraph](http://www.fastgraph.com/)
    (DOS, Win32) – Proprietary graphics library for DOS and Windows
    ([version 3.0.3](https://archive.org/details/blobby03_cracked)). Requires
    Microsoft FORTRAN compiler.
  * [GGG](http://www.unige.ch/~hairer/GGGraphics.html)
    – Geneva Group Graphics library for FORTRAN and LaTeX.
  * [GRAFIC](https://web.archive.org/web/20021204062152/http://www.physics.ohio-state.edu/~koepf/grafic.html)
    – Library of interactive graphics routines for UNIX.
  * [moriplot](https://web.archive.org/web/19970727210155/http://phase.etl.go.jp/contrib/moriplot/)
    – Plotting program for Sun OS 1.4.2, by Masatake Mori.
  * [OzAPI](https://sourceforge.net/projects/ozapi-tcl-tk/)
    – Enables user interfaces to be developed and graphics output to be designed
    for FORTRAN and C programs using Tcl/Tk libraries. Includes example program
    in FORTRAN.
  * [PBMA_IO](https://people.sc.fsu.edu/~jburkardt/f_src/pbma_io/pbma_io.html)
    – Read and write utilities for Portable Bit Map (PBM) files.
  * [PGPLOT](https://www.astro.caltech.edu/~tjp/pgplot/)
    – Scientific graphics subroutine library for FORTRAN 77 and C.
  * [PLplot](http://plplot.sourceforge.net/)
    – Cross-platform software package for creating scientific plots.
  * [PSPLOT](https://web.archive.org/web/20050831063710/http://www.nova.edu/ocean/psplot.html)
    – Free Fortran-callable PostScript plotting library.
  * [SDL 77](https://github.com/interkosmos/sdl77)
    – FORTRAN 77 graphics and multimedia library based on SDL 1.2.
  * [ThanCad Fortran Dxf Library](https://sourceforge.net/projects/thandxflib/)
    – FORTRAN 77 library to create DXF drawings.

### Message Passing

* [F77_ZMQ](https://github.com/zeromq/f77_zmq)
    – ZeroMQ bindings for FORTRAN 77.
  * [SIDL](https://computing.llnl.gov/projects/babel-high-performance-language-interoperability/#page=home)
    – FORTRAN 77 interface bindings to the *Scientific Interface Description
    Language* of the Babel middleware.

### Databases

* [RIM](https://github.com/interkosmos/rim)
    – Relational database management system, written in FORTRAN 77, by
    Boeing, NASA, and University of Washington.

### CGI

* [AMWAVE](https://web.archive.org/web/20010804052858/http://www.fcc.gov/mmb/asd/bickel/fortran2.html)
    – FORTRAN 77 POST method CGI example.
  * [COLORIT](https://web.archive.org/web/20001207085100/http://www.fcc.gov/mmb/asd/bickel/fortran.html)
    – FORTRAN 77 GET method CGI example.
  * [FORTRAN CGI](https://www.nber.org/sys-admin/fortran-cgi/)
    – Native FORTRAN 77 CGI interface.

### Serialisation

* [F77xml](https://web.archive.org/web/20051103173427/http://icbe61.unife.it:80/f77xml/)
    – C library designed to provide DOM parsing functionality to FORTRAN 77.
  * [Harwell-Boeing](https://people.sc.fsu.edu/~jburkardt/data/hb/hb.html)
    – File format used to store sparse matrices.
  * [NetCDF](https://www.unidata.ucar.edu/software/netcdf/docs-fortran/nc_f77_interface_guide.html)
    – FORTRAN 77 interface to the NetCDF library.
  * [PnetCDF](https://github.com/Parallel-NetCDF/PnetCDF)
    – Parallel I/O library for accessing NetCDF files.

### System

* [ANSI.SYS](https://web.archive.org/web/20020604045509/http://www.ccwr.ac.za/~lynch2/ansi.sys.html)
    – Using the `ANSI.SYS` driver to enhance FORTRAN 77 programs (MS-DOS).

## Utilities

* [f2f90](https://github.com/btrettel/f2f90)
    – Utility to convert FORTRAN 77 fixed source form to Fortran 90 free source
    form, by Michael Metcalf, Peter A. Rochford, Ben Trettel.
  * [ffixed2free](https://github.com/MeteoSwiss/ffixed2free)
    – Converts FORTRAN fixed-format source code to free-format source code, by
    Pirmin Kaufmann and Martin Schraner.
  * [findent](https://sourceforge.net/projects/findent/)
    – Indents, beautifies and relabels Fortran source, fixed and free format,
    and converts fixed format to free format (and vice-versa).
  * [Perl for Fortran](https://web.archive.org/web/20011004055401/https://marine.rutgers.edu/po/perl.html)
    – Several Perl scripts useful when working with Fortran programs.
  * [to_f90](https://github.com/jbdv-no/to_f90)
    – Tool to convert FORTRAN 77 code to free-form code, by Alan Miller.

## Source Code Documentation

* [for2html](http://for2html.sourceforge.net/)
    – FORTRAN 77 to HTML translator.
  * [ROBODoc](https://rfsber.home.xs4all.nl/Robo/index.html)
    – Documentation tool that extracts the documentation from your source code
    and formats it in HTML, RTF, TeX, XML DocBook (PDF), or ASCII.

## Static Code Analysis

* [FLOPPY](http://www.netlib.org/floppy/)
    – Software tool that takes as input a file of FORTRAN 77 code and checks it
    according to various “coding conventions”. FLOW produces reports based on
    the output of FLOPPY.
  * [FPT](https://web.archive.org/web/20010515193039/http://www.simcon.uk.com/)
    – Suite of tools for writing, maintaining, and migrating FORTRAN programs.
  * [fsource](https://github.com/mwallerb/fsource)
    – Collection of tools written in Python to parse FORTRAN 77 to Fortran 2008 programs.
  * [FTNCHEK](https://www.dsm.fordham.edu/~ftnchek/)
    – Static analyser for FORTRAN 77 programs that is designed to detect certain
    errors in a FORTRAN program that a compiler usually does not.
  * [i-Code CNES](https://github.com/lequal/i-CodeCNES)
    – Static code analysis tool to help developers write code compliant with
    CNES coding rules for FORTRAN 77, Fortran 90 and Shell.

## Benchmarks

* [Computational Fluid Dynamics Benchmark](https://web.archive.org/web/20050311034159/https://www.ec-nantes.fr/DMN/WWW/Hardware/Bench/index.html).
  * [SPEC CPU92](https://www.spec.org/cpu92/cfp92.html)
    – Benchmarks designed to evaluate the floating point operations performance
    of a given system, by the Standard Performance Evaluation Corporation
    (commercial).
  * [MDBNCH](https://web.archive.org/web/20010815033640/http://www.sissa.it/furio/mdbnch.html)
    – Molecular dynamics benchmark.
  * [Netlib Benchmarks](http://www.netlib.org/benchmark/)
    – Benchmark programs and reports.

## Editors & IDEs

* [VFort](https://web.archive.org/web/20080417003319/http://www.imamod.ru/~vab/vfort/)
    (Win32) – Programmer-oriented text editor, with g77.
  * [Yapakit](https://web.archive.org/web/20181107031816/http://yapakit.fortran.pagesperso-orange.fr/)
    (Win32) – Free Fortran source code editor.

## Language, FAQs, Tutorials

### Introduction

* [FORTRAN FAQ](http://www.faqs.org/faqs/fortran-faq/)
    – Frequently Asked Questions, compiled by Keith H. Bierman.
  * [Professional Programmer’s Guide to FORTRAN 77](https://www.tat.physik.uni-tuebingen.de/~kley/lehre/ftn77/f77prof.pdf)
    – Introduction by Clive G. Page.
  * [User Notes on Fortran Programming (UNFP)](http://www.ibiblio.org/pub/languages/fortran/)
    – An open cooperative practical guide.

### Coding Style

* [FORTRAN 77 Coding Guidelines](https://web.archive.org/web/20000530084632/http://ics.uci.edu/pub/levine/F77_Style_Guide)
    – By David L. Levine.
  * [Fortran Coding Style for the Modern Programmer](https://web.archive.org/web/20000421165600/http://studbolt.physast.uga.edu/templon/fortran/fortran_style)
    – By Glen Reesor.

### Standards

* [ANSI X3J3/90.4](https://web.archive.org/web/20070702014846/https://www.fortran.com/fortran/F77_std/f77_std.html)
    – Official FORTRAN 77 standard
    ([HTML format](https://web.archive.org/web/20070205092427/http://www.fortran.com/fortran/F77_std/rjcnf0001.html)).
  * [NIST FORTRAN 77 Test Suite](http://www.fortran-2000.com/ArnaudRecipes/fcvs21_f95.html)
    – FCVS78 validation programs by NIST Information Technology Laboratory (ITL)
    to check compiler conformance to the FORTRAN 77 language standard
    ([documentation](https://sourceryinstitute.github.io/RefactorF4Acc-test-docs/tests/NIST_F78_test_suite/fcvs21_f95/doc/index.html)).

### Transition to Modern Fortran

* [Fortran 90 for the FORTRAN 77 Programmer](https://www.nsc.liu.se/~boein/f77to90/f77to90.html).
  * [Fortran 95 for the FORTRAN 77 Programmer](https://web.archive.org/web/20080123082959/http://www.soks.org/view/Fortran95ForFortran77Programmers).
  * [Rocket Science](https://github.com/everythingfunctional/rocket-science)
    – A case study in modernising legacy Fortran software.

## Free Books

* [Numerical Recipes](http://numerical.recipes/oldverswitcher.html)
    – Free download of the book series on numerical analysis and algorithms in
    FORTRAN 77 and Fortran 90
    ([critisism](https://web.archive.org/web/20020607233154/http://math.jpl.nasa.gov/nr/),
    [alternatives](https://web.archive.org/web/20011005185358/http://math.jpl.nasa.gov/nr/nr-alt.html)).

## Games

* [Canabis](http://trac.netlabs.org/canabis)
    (OS/2, Win32) – Tk-based Canasta card-game in FORTRAN 77.
  * [COMEL](https://core.ac.uk/download/pdf/36712909.pdf)
    – A military communications-oriented war game, developed by the Joint
    Telecommunications Staff Officers’ Course at Keesler Air Force Base in 1983.
  * [Colossal Cave Adventure](https://ifarchive.org/indexes/if-archive/games/source/)
    – Several FORTRAN 77 ports of the famous text adventure, originally written
    by Will Crowther.
  * [Conway’s Game of Life](https://github.com/owainkenwayucl/fortlife)
    – Simple implementation in FORTRAN 77 for DOS.
  * [LIFE_SERIAL](https://people.sc.fsu.edu/~jburkardt/f77_src/life_serial/life_serial.html)
    – Another implementation of Conway’s Game of Life, by John Burkardt.
  * [Empire](https://www.classicempire.com/)
    – Strategy and tactics war game, ported to various platforms (FORTRAN IV).
  * [Hunt the Wumpus](https://github.com/YeonJu/wumpus)
    – Four implementations in FORTRAN 77, LISP, Prolog, Literate-Java.
  * [Mystery Mansion](http://newton.freehostia.com/mmm/)
    – Late 1970s text-based adventure computer game written by Bill Wolpert
    while at the Naval Undersea Warfare Center.
  * [OREGON 77](http://cyber.dabamos.de/programming/fortran/oregon/)
    – Source port of the 1978 version of The Oregon Trail to ANSI FORTRAN 77.
  * [RFK-77](http://cyber.dabamos.de/programming/fortran/rfk/)
    (DOS) – Implementation of [robotfindskitten](http://robotfindskitten.org/)
    in FORTRAN 77.
  * [Rock, Paper, Scissors](https://craftofcoding.files.wordpress.com/2018/06/prac_fortrps.pdf)
    – FORTRAN 77 and Fortran 90/95 implementations.
  * [University of Toronto FORTRAN Games](http://freshmeat.sourceforge.net/projects/fortran-games)
    – Chess, Tic Tac Toe, Minefield, and other games, some dating back to the
    late 70’s.
  * [TREK 7](https://sourceforge.net/projects/trek7/)
    – Original multiplayer network Star Trek game from the early-mid 70s.

## Humor

* [COME FROM](http://www.fortranlib.com/gotoless.htm)
    – A linguistic contribution of GOTO-less programming.
  * [Fortran Songs](http://www.poppyfields.net/filks/f.html)
    – Singin’ and dancin’ to the joy of programming in FORTRAN.
  * [“FORTRAN”](https://www.netfunny.com/rhf/jokes/92q2/fortran.html)
    – A song.
  * [Real Programmers Don’t Use Pascal](https://web.mit.edu/humor/Computers/real.programmers)
    – Essay about computer programming, written by Ed Post.

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