Here is a list of all files with brief descriptions:

chipmunk.h
chipmunk_ffi.h
chipmunk_private.h
chipmunk_types.h
chipmunk_unsafe.h
ChipmunkDebugDraw.h
ChipmunkDemo.h
cpArbiter.h
cpBB.h
cpBody.h
cpConstraint.h
cpDampedRotarySpring.h
cpDampedSpring.h
cpGearJoint.h
cpGrooveJoint.h
cpPinJoint.h
cpPivotJoint.h
cpPolyShape.h
cpRatchetJoint.h
cpRotaryLimitJoint.h
cpShape.h
cpSimpleMotor.h
cpSlideJoint.h
cpSpace.h
cpSpatialIndex.h
cpVect.h
glut.h
prime.h
util.h