gpgkeymgr is a tool for cleaning up and managing your GnuPGP key ring. It removes old and unnecessary keys according to user-specified criteria. For example, you can remove all expired or revoked keys, or all keys you don't trust, and much more.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
