Professor Norm Matloff
Dept. of Computer Science
University of California at Davis
Davis, CA 95616
(Please mail any questions to Norm Matloff.)
Chipmunk homepage at UC Berkeley. (The old Caltech page doesn't work anymore.) Contains source code (you need to get psys and log), compiling hints, utilities.
Norman Matloff's own hints for getting Chipumnk source code and compiling it.