|- Does this fortran software work on windows 7 or do you know of a free one that does? gfortran works on all variants of windows I am aware of. There are several projects out there which provide the gfortran compiler with some utilities targeted to windows. The one I have experience with is mingw. Highly recommended. a google for that word alone will get you what you need. There are a couple of commercial fortran compilers that are available under various licenses; depending on the use they could be no cost. Intel is one, the product is called 'ifort'. HTH, Bud Davis
