Are you willing to purchase a compiler? If so, there are some commercial products available, for example, Pro Fortran 2014: http://www.absoft.com/
Otherwise, you might be interested in Open Watcom. I don't have extensive experiences with it myself. I downloaded it a couple years ago to test original Fortran code against my C++ translations but, other than that, haven't used it much. Still, it might suffice for your purposes.