PGP Tools is a collection for all kinds of pgp related things, including signing scripts, party preparation scripts etc.

caff is a script that helps you in keysigning. It takes a list of
keyids on the command line, fetches them from a keyserver and calls
GnuPG so that you can sign it. It then mails each key to all its email
addresses - only including the one UID that we send to in each mail.

pgp-clean takes a list of keyids on the command line and outputs an
ascii-armored keyring on stdout for each key with all signatures
except self-signatures stripped. Its use is to reduce the size of keys
sent out after signing. (pgp-clean is a stripped-down caff version.)

gpg-key2ps will output a PostScript file which has your Key-ID, UIDs
and fingerprint nicely formatted for printing paper slips to take with
you to a signing-party.

Given one or more key-ids, gpg-mailkeys mails these keys to their
owners. You use this after you've signed them. By default, the mails
contain a standard text and your name and address as the From (as
determined by the sendmail command).

gpglist takes a keyid and creates a listing showing who signed your
user IDs.

gpgsigs was written to assist the user in signing keys during a
keysigning party. It takes as input a file containing keys in gpg
--list-keys format and prepends every line with a tag indicating if
the user has already signed that uid.

keylookup is a wrapper around gpg --search, allowing you to search for
keys on a keyserver. It presents the list of matching keys to the user
and allows her to select the keys for importing into the GnuPG
keyring.