encryption

GnuPG is a file encryption.

Free File-Encryption-Tool! Small, simple, fast and safe!

Jabber/Google Messenger encryption and security software.

A free tool to do file/folder encryption in your USB storage devices.

Transparent hard drive encryption for your data.

It support custom search engine,encryption message,emoticon management,etc.

ICQ/AIM Messenger encryption and security software.

MSN Messenger encryption and security software.

Easy-to-use yet a powerful encryption/steganography program

Caesar Shift Cipher will allow the encryption and decryption of data.