Portland Group - Fortran 95, C and C++ Compilers for 32-bit and 64-bit AMD64 and IA32 processor-based Linux and Windows systems. 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. Open Watcom - Fortran 77, C, and C++ compilers for Win32, Win16, DOS, and OS/2. [Freeware, open source] Sun Studio - C, C++, and Fortran compilers and tools developed by Sun Microsystems for Solaris, OpenSolaris, and Linux operating systems. Includes an overview, documentation, support services, and free downloads. 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. Microsoft Fortran Version Features - Provides descriptions of Microsoft Fortran compilers and tools, along with features, notes, and photos. 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] F - Subset Fortran 95 compiler, keeping only the modern features. The compiler is freely available on Windows, Linux, and Solaris. Free Fortran Compilers and Interpreters - Links to free compilers and interpreters, mostly Fortran 77. BC Fortran - MS-DOS 16-bit Fortran 77 compiler/linker/debugger. A Portable Fortran 77 Compiler - Description of the construction of a portable compiler, by S. I. Feldman and P. J. Weinberger. 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. Intel Compilers - Fortran and C++ compilers for Linux and Windows. Includes documentation, support information, and free downloads for evaluation and non-commercial use. NAG Fortran Compiler - Commercial Fortran 95 compiler with Fortran 2003 features for Linux, Windows, and Unix. 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 (operating on more complicated sparse data structures), thereby reducing storage requirements and computational time of the original application.