Seahorse
Computers, Security, Products and Tools, Cryptography - Seahorse. Seahorse is a Gnome front end for the GnuPG (Gnu Privacy Guard) file encryption/decryption program.
https://seahorse.sourceforge.net/
myPGP: An experimental PGP clone
Computers, Security, Products and Tools, Cryptography - myPGP - Experimental PGP clone. myPGP is a free software (GPLed) clone of PGP, and can be used to encrypt, decrypt and sign messages in a public key system.
https://mypgp.sourceforge.net/
Coviant Home-Secure File Transfer-PGP,SFTP(SSH),FTPS(TLS/SSL),PCI,Sarbanes,HIPAA,MA Privacy
Computers, Security, Products and Tools, Cryptography - Coviant Software for B2B OpenPGP Software. Diplomat Transaction Manager from Coviant Software is built using OpenPGP encryption to enable easy set-up and administration of secure, business-to-business file transfers, including scheduling of file transfer jobs, email/paging problem notifications, and a flexible audit trail database.
https://www.coviantsoftware.com/
Prime Factors Security and Encryption Software
Computers, Security, Products and Tools, Cryptography - Prime Factors, Inc.. Source of OpenPGP (RFC 2440) software for multiple platforms - Windows, Unix, OS/400 and zOS.
https://www.primefactors.com/
Authora Public Key Encryption Software
Computers, Security, Products and Tools, Cryptography - Zendit and Sovereign by Authora Inc.. Developes and supports ZENDIT simple to use public key technology for encryption, digital signatures, and digital identity software that is compliant with the OpenPGP standard.
http://www.authora.com