TIDY

The TIDY application was developed to be a highly configurable FORTRAN program to indent and renumber statements, selectively change case of keywords or non-keywords, and do various other clean-up tasks on FORTRAN-77 source programs.
TIDY can convert some FORTRAN-66 features such as Hollerith constants to FORTRAN-77. TIDY can either retain DO/END DO loops or convert them to standard FORTRAN-77 loops. It can change comment specifiers from C,c,or * to ! as in F90 style. Supports F90 CYCLE, EXIT, DO WHILE loops, IMPLICIT NONE, INCLUDE statements,
long variable names, the relational operators ,=, ==,/= and the use of underscores in variable names.
Usage:
tidy fname.ext
where fname.ext is the source file containing the FORTRAN code to be cleaned up. If .ext is omitted in the invocation, then the source is looked for in fname.for and fname.f in that order.
The tidied program is put in fname.tid and the listing including error messages in fname.lis. Many formatting options for TIDY can be set in an initialization file. TIDY
looks for an initialization file tidy.ini in the current directory. If tidy.ini is not found, then it is assumed that there is no control file.
NOTE:
Free for non-commercial useLimitations in the unregistered versionThe F90 extensions to ANSI Fortran-77 supported are DO/ENDDO loops, DO WHILE loops, comment cards starting with an ! (exclamation mark) in column 1, CYCLE, EXIT, lower
case characters, IMPLICIT NONE, INCLUDE statements, long variable names, the relational operators ,=,==,/= and the use of underscores in variable names.