PeRColate
PeRColate is an open source set of extensions to Max/MSP, developed by Dan Trueman at Princeton University and R. Luke DuBois at the Computer Music Center, Columbia University. It contains a partial port of the STK, as well as a number of objects replicating unit generators from classic MUSIC-N languages. It is widely used as an extension to the Max API. A series of audio plug-ins based on the objects are also distributed by the authors.
PeRColate is named after the initials of Perry R. Cook, one of the authors of the STK.