Awesome

findent

indent, relabel and convert Fortran sources

findent supports Fortran-2018, including OpenMP conditionals
findent can convert from fixed form to free form and vice-versa
high speed: 50K - 100K lines per second
configuration files and instructions for vim, gedit and emacs
since version 2.7.0, findent is very vim-aware an can be used in equalprg and indentexpr
wrapper for processing one or more files in one call available for Unix and Windows (wfindent and wfindent.bat respectively)

Alas, it seems I am not able to push to github any more, so the following is relevant:

The newest version of findent is located at https://sourceforge.net/projects/findent/