Converting Sound to Image

[Necrox]

I've been really liking the Reaktor Ensemble Skrewell and I wonder if there's some sort of (free, preferably) program that generates images according to the audio. The kicker is that I don't want a waveform or other spectrum-reading tool; I'm looking for something more abstract, like fractals and random patterns or whatever. I've googled but couldn't find anything.

[JohnStacy]

What you could do is use a standard visualizer, like what comes default in many media players.  Then you can screenshot the result.
I've seen many visualizers that turn it into fractals or shapes or whatever.  There are many options out there!