What would you recommend as a good FFT program for use with laptop internal sound cards?
Ideally it would come from a reliable source such as a university, meaning not too many bugs and no virus. It should have a somewhat practical user interface. I am not a programmer who could easily compile something using a collection of routines such as the FFTW files from MIT. I do have some programs that came with engineering books I bought but these are DOS and can't handle sound card access easily anymore. They are from the days when you piped external ADC stuff into the PC via the parallel port. Free would be nice, of course ;-)
So far I found this one from Rutgers: