Icon browser at Department of CS at the University of Pisa Mosaic Rulesz pointers to even more. 3D objects in a variety of formats. Also see The Cypherpunks Home Page . RSA's home page may provide some additional information. The software itself is available in the US via the Web from MIT .
Tools exist to automate the chaining.
Also see the Admin Guide to Cracking and The Uebercracker's Security Web Csound from the MIT Media Lab .