Absoft Fortran95 Compiler for 64-bit AMD Opteron/Linux
Absoft's latest Linux Fortran Compiler (Fortran 95 v9.0 for 64-bit AMD Opteron-based clusters) combines superior performance, solid reliability and the industry's most complete list of tools and libraries into a single package. New optimizations specifically designed for x86-compatible AMD64 processors deliver industry leading application performance and Absoft Fortran95 allows generation of both 32-bit and 64-bit executable programs in a single environment. For maximum efficiency at tracking down and eliminating bugs, every copy of Absoft Fortran 95 includes a copy of Fx2™, the industry-leading Fortran debugger, at no additional charge.

GNU Compilers C, C++ (gcc) 3.3

Microsoft Visual C, C++ Compiler
The 64-bit build environment in the release of the Microsoft® Windows® Server 2003 DDK includes a 64-bit compiler you can use to build and test 64-bit driver code that runs on AMD64 processors. The following sections describe the AMD64-specific aspects of this compiler.

NAGWare f95 Compiler (Fortran) by NAG
Fortran compiler for Linux.

PathScale EKO Compiler Suite (C, C++, Fortran)
Fortran, C, C++ Compiler for Linux.

PGI Fortran and C High-Performance
Compilers and Tools from The Portland Group
New in version 5.2 of PGI compilers is support for full Fortran 95 extensions, one-pass interprocedural analysis, full support for large data objects >2GB and full 64-bit support on AMD64. Download a free 15-day trial of the PGI Workstation 5.2 compilers and tools for 32-bit x86 or AMD64 Linux or Win32 workstations or servers. Email questions to sales@pgroup.com or call PGI sales at (503) 682-2806.

Sun One Studio 8
C, C++ Compilers & Tools for Solaris x86.