Site describes the GNU Fortran 95 project and explains how to obtain a Linux x86 binary.

Integrated development environment for compiling Fortran 77 programs on Win32 platforms using the G77 compiler and debugging them with GDB. Ftnchek is used to find errors in the code. By Guilherme Luiz Lepsch Guedes.

Free Fortran 77 compiler using the GCC back-end.

Mingw binaries for Windows 95/98/Me and Windows NT4/2000/XP.

Ongoing project to create a free, open source Fortran 95 compiler and runtime libraries. Almost all of Fortran 95 is supported. Compiler binaries for Linux, Unix, OS X, and Windows available.

Ongoing project to develop a Fortran 95 compiler front end, as well as runtime libraries, for the GNU Compiler Collection (GCC).

Project to implement Open MP for the C, C++, and Fortran compilers in GCC.

Windows IDE for g77, with pre-compiled SLATEC and DISLIN libraries, by Nikoly and Petr Vabishchevich.