Encryption Tools

The top 24 free tools for data encryption

Disk Encryption

1. BitLocker
2. Discryptor

File Encryption

1. AES Crypt
2. Challenger

Steganography

1. Steg
2. Our Secret
3. OpenPuff

Email Encryption

1. iSafeGuard
2. HushMail
3. Sbwave

Portable Drive Encryption

1. Rohos Mini Drive
2. BitLocker Pro
3. SecurStick

Data in transit encryption.

1. OpenSSL
2. Stunel

Remote Management Encryption

1. OpenSSH
2. PuTTY -- my favorite tool, easy to use.
3. PowerShell
4. Remote Desktop Connection Manager

Multitaskers

1. 7-Zip
2. GPG
3. Sophos Free Encryption
4. Cloudfogger
5. AxCrypt

Source: http://www.gfi.com/blog/the-top-24-free-tools-for-data-encryption/