Free Fortran Software

This software is made available as a service of the Fortran Market and others. Please take anything you think you will find useful.

There should be a version of the I/O module and the kind parameter module for each Fortran 90 implementation. Vendors: please supply a version for your implementation!

• There are free versions of the F compiler available from Imagine1, Inc. for Windows, Linux, the Mac, and several versions of Unix.
• COCO free source code from Purple Sage
• A Fortran 90 syntax (lexical) coloring file for the vim text editor is available at http://www.unb.ca/chem/ajit/f90.vim. It has options for fixed source format, Fortran 95, the Lahey subset language elf90, and the Imagine1 subset language F.
• Generic linked list module provided by Peter McGavin and Roger Young
• Variable precision arithmetic module by Lawry Schonfelder
• FMZM90 (related to FMLIB), provided by David Smith of Loyola Marymount University, is a Fortran-90 module that defines three derived types: multiple-precision real, multiple-precision integer, and multiple-precision complex. Interfaces are provided so that a program can declare variables to be multiple-precision types and then write the code for multiple-precision operations using normal Fortran syntax.
• Some code that determines processor dependencies and build a usable module can be found here, compliments of Dan Nagle.
• This site at NIST contains Fortran 90 bindings for OpenGL.
• Pacific-Sierra Research free Linux Fortran 90 compiler
• Here is a Fortran 77 to Java translator.
• Stepanyuk Oleg has written "Optima90L", free downloadable software to adapt your F66/F77 sources for F90 and remove all operators which will be removed from next Fortran (F2000?) or optimize your F90 sources for better speed & compatibly. This program will give you recommendations about adapting & optimizing your text for full compartibly with F90.
• Ernst Meese of the Norwegian University of Science and Technology, Trondheim, Norway has written a small library in Fortran 90 for solving sparse matrix problems. It contains modules for the compressed sparse row (CSR) and the modified sparse row (MSR) data storeage formats, a very general incomplete LU factorsation routine, the Krylov subspace solvers CGS, BiCGSTAB and GMRES, and some more. understandable. It is available together with a manual by ftp at ftp.maskin.ntnu.no/pub/mtf/smlib.
• C2F, a C to Fortran 90 translator for Windows 95/NT.
• A program that attempts to convert Numerical Recipes Fortran 90 code to make it compatible with the ELF90 compiler.
• PSPLOT, a Fortran-callable PostScript plotting library
• ForUtil, a collection of free Fortran 77 utilities from Ripley Software Development
• PGPLOT Graphics Subroutine Library
• The libraries section contains links to many program libraries.
• CCF is a conditional compilation facility for Fortran.
• Three utilities provided by Michel Olagnon of Ifremer: f90ppr, a Fortran 90 preprocesor, f90split, a Fortran 90 version of fsplit, and f90tops, a Fortran 90 to PostScript converter
• FLIB, a collection of Fortran routines, with emphasis on nonnumeric computations, contributed by Rob Stewart of Kansas State University.
• The High Performance Fortran Library in Fortran 90
• Fortran-M is a small set of extensions to Fortran that supports a modular approach to the design of task parallel, message-passing programs.
• f2c, a Fortran 77 to C translator; for a DOS C compiler to go with it, check out DJGPP.
• Information about GNU Fortran (g77).
• Fixed-to-Free Source Form Converter; alternate site; a preconverter for convert.f90
• f2f90, a command-line version of Metcalf and Reid's convert.f90, which converts fixed source form to free source form
• A module containing kind parameters. There is a different version for each Fortran 90 implementation.
  • EPC Fortran 90
  • Fujitsu Fortran 90
  • NAG F90
  • PSR VAST-90
• Large Integers Module
• David Bailey's Multiple Precision Arithmetic Module
• Interval Arithmetic software plus papers and other information about interval arithmetic maintained by R. Baker Kearfott, Department of Mathematics, University of Southwestern Louisiana, U.S.L. Box 4-1010, Lafayette, LA 70504-1010 USA; rbk@usl.edu; +1-318-482-5270, +1-318-482-5346 (fax) (the software is in directory intlib).
• An Input/Output Module containing some commonly used constants and a useful function that finds an unused unit number. There is a different version for each Fortran 90 implementation.
  • EPC Fortran 90
  • Fujitsu Fortran 90
  • NAG F90
  • PSR VAST-90
• Floppy, a f77 coding convention checker and code tidier
• Flow, which takes output produced by Floppy and produces various reports on the structure of the original Fortran program
• A module for sets of integers
• Roman numerals module
• There is a bunch of free software available on the Numerical Algorithms Group software repository and many items of related interest as well.
• Molecular dynamics Fortran 77 benchmark
• The NAS Parallel Benchmarks
• A random number generator in a module from George Marsaglia
• A random number generator written in Fortran 77 (or Fortran 90 fixed form).
• Another random number generator written in Fortran 77 (or Fortran 90 fixed form).
• A Linux script to run f2c and other Fortran related stuff for Linux.
• A Fortran 77 quick sort and another Fortran 77 quick sort
• Ratfor, with some bugs fixed, compliments of Jon Claerbout of Stanford University
• FTNCHEK, which detects unused, undeclared, and uninitialized variables, provided by Robert Moniot (439K bytes)
• A perl script that makes Fortran 90 make files, contributed by Michael Wester.
• StopWatch, a Fortran 90 module for timing Fortran programs, developed by William Mitchell of NIST.
• A program that diagrams Fortran (including Fortran 90 and 95) programs.
• FLECS, preprocessor that translates into Fortran 90
• EZUP, a Fortran 77 to ELF90 converter
• FXDR, subroutines to do unformatted I/O accross platforms, provided by David Pierce at UCSD
• There is a bunch of F90 software, including least squares, quad precision, and random number generation, from Alan Miller.
• There are example programs from the Online Tutorial for Windows 95 applications programming with Fortran by Vladimir V. Vasilchenko.
• A Fortran 77 subroutine that converts Unix time into date and time