Sniffer fo OpenPGP (SfOPGP) is a freeware message packet analyser for the OpenPGP standard. SfOPGP analyses ASCII armored OpenPGP messages and shows their content in a result window. SfOPGP is not an encryption tool, and it does not (yet) support any access to the encrypted information of the messages.
I have written this application to have the opportunity to learn more about PGP and OpenPGP. I recommend to everybody who is using an OpenPGP application and who cares about the tools he uses, to have a look at some messages with SfOPGP; the more one knows about the security tools one uses, the less are the chances of doing mistakes that could compromise the security.
For those of you who have GPG, there is an option doing almost the same thing as SfOPGP:
gpg --list-packets
SfOPGP is based on CryptLIB and CryptLIBOpenPGP, developped with Delphi 5.0 (also compiles with Delphi 4.0).
Source Code (SfOPGP is currently in alpha version, and there is no source available for public download. If you would like to get the source of the alpha release, please end me an e-mail)