The examples at the link don't seem to require any materials screening.  I did get a very basic test to work, for the spring system.  In terms of collisions, Spanki is working on porting some geometry functions (including point-in-tri collisions) to a .pyd file.  If that works out, we'll see a speed gain which might make something like this more feasible (in a very simplified application, presumably).  The examples use quick collisions with a sphere or plane.  Something like that would be feasible, I assume, albeit inaccurate.  Possibly good enough for rope dynamics.

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.