sigmaker is a random .signature generator. Unlike many other .signature generators, sigmaker does not use a named pipe for supplying the signature. Use of a named pipe will generally cause a MUA to lock-up when trying to read the signature if the signature generator is not running. sigmaker just writes a file .signature, which should be absolutely fail-safe and compatible with everything.
Dead on arrival
Those guys had some nice ideas, but the site seems to have disappeared. :-(