Toolsley PGPigeon - Simple but powerful OpenPGP-compatible message encryption webapp.
Jetico BCTextEncoder - Jetico BCTextEncoder is software that ensures your text-based communications are safe by allowing you to encrypt them.
DeliverySlip - DeliverySlip helps simplify, secure, and expedite the burdensome elements of online collaboration...
TheLetterEncrypter - TheLetterEncrypter is a small (14KB download) AES-based text-encryption program.
GPGTools - Use GPG Suite to encrypt, decrypt, sign and verify files or messages.
CTI Text Encryption - CTI Text Encryption is an encryption tool that can encrypt any text from messages and articles to codes, etc.