ModPlug player lets you rip tracker files to .wav files. You could probably do the same thing in WinAmp, just not as intuitively.
An s3m to MIDI utility was likely programmed by someone, but honestly it sounds ****ing useless to me. Trackers are really just grids by which to program what point in time a wav file plays back. Sure you can control the speed at which it plays back, and FastTracker and ImpulseTracker even incorporated envelopes, but the point is that tracking is based on samples. A MIDI file of note on commands would be useless.
Getting a real sampler and reconstructing the mod file and resequencing it is a long, tedious process. Believe me, I know, I've done it on a few songs. In the end I ended up just sampling phrases and playing those back. It would have actually taken less time to just make a whole new damn song than reconstructing an old mod one. A few of my more "out there" tracker songs just got bounced to wav and played back as a whole wav file, something I hated doing but didn't really have any other option.