With Distributed John (DJohn) you can crack passwords using several machines to get passwords sooner than using a single machine. The cracking in itself is done by John The Ripper and djohn's server (djohnd) divides the work in work packets and coordinates the effort among the clients (djohn), which are the ones who do the work. Readme available here.
706959c41a8c5af41dc7bece54cd562282a245ba2029979c068206628158b55b