DeliverySlip - DeliverySlip helps simplify, secure, and expedite the burdensome elements of online collaboration...
Jetico BCTextEncoder - Jetico BCTextEncoder is software that ensures your text-based communications are safe by allowing you to encrypt them.
GPGTools - Use GPG Suite to encrypt, decrypt, sign and verify files or messages.
TheLetterEncrypter - TheLetterEncrypter is a small (14KB download) AES-based text-encryption program.
Toolsley PGPigeon - Simple but powerful OpenPGP-compatible message encryption webapp.
GNUPGK - A GnuPG Frontend GUI made in C#.