codecrypt is a GnuPG-like program for encryption and signing that uses only quantum-computer-resistant algorithms.
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.
An interface library to access tags for identifying languages.
An easy database query library.