From Absoft Corporation:
The Absoft Pro Fortran Compiler Suite for Macintosh OS X is the worldÃ??Ã¢??s #1 Fortran tool kit because it is the only environment specifically designed for Fortran development on Macintosh. Included with the tool kit are both Fortran 95 and C/C++ compilers, a powerful IDE, industry leading Fx2Ã??Ã¢?Â¢ debugging environment, math and VAX/Unix libraries, graphics and free techical support. Fully Panther compatible, Pro Fortran v9.0 also supports IBM XL Fortran and XL C/C++ as drop in compilers. Mix, match development, Fortran/C++ or Absoft/IBM in a single environment. Optional third party tools such as VAST can be shared between Absoft and IBM compilers.