Just found some interesting links regarding procedural generation
I have not yet examples of stuff made by these apps
need some practice with Context Free to make something original not just modifications of the examples
I'm more Mac oriented, I have not found many more programs in this type of procedural genre.
Regarding sound produced by some sort of procedural generation: there are a few which produce "sounds", not quite music, imho
It seems difficult to produce music via this way
Photosounder: not quit generative I think, but it's a special
Anyway: I think Subversion can be quite interesting to be used not only as a game
But also as some sort of City generator and then many possibilities !
I have posted this in the Subversion Development Suggestions Sticky