GnuPG - GnuPG is a complete and free implementation of the OpenPGP standard as defined by RFC4880 (also known as PGP).
Knox - Knox offers easy disk image encryption and comes with a built-in backup service.
File Encryption XP - A program designed for protecting confidential information stored on your computer.
Exocet - Exocet creates a Folder on your System.
GPG Suite - Use GPG Suite to encrypt, decrypt, sign and verify files or messages.
R-Crypto - R-Crypto is smart data security and disk encryption software that allows you to secure your sensitive information via strong encryption.