GNUPGK - A GnuPG Frontend GUI made in C#.
TheLetterEncrypter - TheLetterEncrypter is a small (14KB download) AES-based text-encryption program.
CTI Text Encryption - CTI Text Encryption is an encryption tool that can encrypt any text from messages and articles to codes, etc.
SecretPad - SecretPad is software that encrypts your plain text into a form that cannot be understood by anyone.
Crypditor - Crypditor is a text editing platform that encrypts all your sensitive information with the help of its highly secure AES Algorithm.
PlainText Crypto - PlainText Crypto is software that can encrypt or decrypt all your files in plain text.