1)   Cryptic Disk 2.5.4
Cryptic Disk 2.5 provides a simple and affordable way to protect disks and disk partitions by encrypting them. The encrypted data cannot be accessed without entering the password, even if a hacker gets access to a PC or the hard drive is stolen.

 2)   Hexprobe Storage Encryption Tool 2.1
A simple, easy to use disk encryption tool that encrypts and password protects your removable and external disk. Its powerful encryption ensures that only you can open an encrypted logical drive.