GNU Fortran - GNU Project - Free Software Foundation (FSF)

The GNU Fortran project, or gfortran, is developing a Fortran compiler front end, as well as runtime libraries, for GCC, the GNU Compiler Collection. GNU Fortran development is a part of the GNU Project, aiming to bring free number crunching to all GNU system variants. The GNU Fortran development effort uses an open development environment in order to attract a larger team of developers and to ensure that gfortran can work on multiple architectures and diverse environments.