A Portable Fortran 77 Compiler
   Description of the construction of a portable compiler, by S. I. Feldman and P. J. Weinberger.
   http://wolfram.schneider.org/bsd/7thEdManVol2/f77/f77.html

Absoft Pro Fortran
   Fortran 95/90/77 and C/C++ compilers for Windows, Mac OS 9 and OS X, Linux IA32 and AMD Opteron and AMD Athlon 64-bit processors. Resells IBM XL Fortran compiler for Mac OS X. Offers VAST parallelization and vectorization tools.
   http://www.absoft.com/

Apogee
   Fortran 90, C, and C++ for SPARC Solaris.
   http://www.apogee.com/compilers.html

BC Fortran
   MS-DOS 16-bit Fortran 77 compiler/linker/debugger.
   http://drn.digitalriver.com/product.php[id]45854[SiteID]macesoftware

F
   Subset Fortran 95 compiler, keeping only the modern features. The compiler is freely available on Windows, Linux, and Solaris.
   http://www.fortran.com/F/index.html

Fortran 66 compiler
   For MS-DOS, distributed by Dynacomp Software.
   http://www.dynacompsoftware.com/ebay/ANSI66.htm

Free Fortran Compilers and Interpreters
   Links to free compilers and interpreters, mostly Fortran 77.
   http://www.thefreecountry.com/compilers/fortran.shtml

Green Hills
   Fortran 77 Compilers conform fully to ANSI X3.9-1978 Standard FORTRAN 77 (Full Language) and FIPS PUB 069-1, and adds the DOD MIL-STD 1753 Fortran extensions and selected VAX/VMS FORTRAN extensions. Supported processors include 68K, MIPS, x86, SPARC, and
   http://www.ghs.com/products/FORTRAN_compilers.html

HicEst
   Incremental compiler and interpreter with interactive Windows graphical user interface designed for immediate results during development of technical or scientific applications. [Shareware, but freeware for shorter scripts]
   http://www.hicest.com/

IBM Fortran Compilers
   Fortran 95 compilers for AIX, Mac OS X, and Linux on IBM iSeries and pSeries platforms. Fortran 77 compiler for IBM mainframes.
   http://www-306.ibm.com/software/awdtools/fortran/

Intel
   Fortran 95 and C++ compilers for Linux and Windows.
   http://www.intel.com/software/products/compilers/

Lahey Computer Systems
   Fortran 95/90 and C++ compilers for Linux, Windows Windows.NET, and SPARC Solaris. Also sells Essential Lahey Fortran subset compiler for Windows and graphics and user interface tools and libraries.
   http://www.lahey.com/

MT1: A Sparse Compiler
   A special kind of source-to-source restructuring Fortran compiler that can automatically transform a dense program (in which all operations on matrices are simply implemented using two-dimensional arrays) into a semantically equivalent sparse program (ope
   http://www.liacs.nl/home/ajcbik/sparse.html

Microsoft Fortran Versions
   Detailed information, including photos.
   http://www.emsps.com/oldtools/msforv.htm

NAGWare
   Fortran 95 compiler with 2003 features for Linux, Windows, and Unix on many platforms.
   http://www.nag.co.uk/nagware.asp

NEC
   Describes 32 and 64-bit Fortran 90 compilers for NEC and IBM PC hardware.
   http://www.nec.co.jp/APSOFT/SX/asl_e/detail.html

Open Watcom
   Fortran 77, C, and C++ compilers for Win32, Win16, DOS, and OS/2. [Freeware, open source]
   http://www.openwatcom.org/

Open64
   Suite of optimizing compiler development tools for Intel Itanium(TM) systems running Linux. The Open64 project is the continuation of the SGI Pro64(TM) compiler suite which was released under the GNU General Public License (GPL). The Open64 compiler sui
   http://www.open64.net/

PathScale
   Fortran 95, C, and C++ compilers for Linux on AMD Opteron and Intel 64-bit and 32-bit x86 CPUs.
   http://pathscale.com/ekopath.html

Portland Group
   Fortran 95, C and C++ Compilers for 32-bit and 64-bit AMD64 and IA32 processor-based Linux and Windows systems.
   http://www.pgroup.com/index.htm

Silverfrost
   Fortran 95 compiler for Win32 and Microsoft .NET. The personal edition is free for non-commercial use.
   http://www.silverfrost.com/11/ftn95/overview.asp

Sun Studio C/C++/Fortran Compilers
   Resources for software developers using C, C++, or Fortran 95.
   http://developers.sun.com/sunstudio/index.jsp