The latest version of the LLVM compiler suite has promoted its Fortran front end. "Flang" is now official.… LLVM 20.1 appeared last week. This is a major release following LLVM 19.1, which came out in ...
If speed isn't an issue you could try Cygwin which comes with gcc which includes a fortran compiler. I mention speed because IMO apps running under cygwin are noticably slower than 'native' ones. And ...