CryptoPad!

Paranoia Text Encryption keeps your SMS, emails, social networking posts, notes and any other text safe from snoopers, hackers and prying eyes.

Core Encryption Algorithm: AES (Advanced Encryption Standard or Rijndael)Password Hashing Algorithm: SHA512Able to encrypt most of the languages in the world.Lightweight, efficient, portable (no installation needed).Able to be encrypted with a combination of 4 passwords.Long text is compressed.

TheLetterEncrypter is a small (14KB download) AES-based text-encryption program.