IRPF90 is a Fortran programming environment which helps the development of large Fortran codes by applying the Implicit Reference to Parameters method (IRP).
findent - indents fixed and free format Fortran sources, and converts from fixed format to free format.
FTNCHEK - static syntax analyser for Fortran 77 by Robert Moniot. Very useful for checking old code. FTNCHEK is now a Sourceforge project, with the aim of bringing it up to date for Fortran 90.
