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. The program uses the AES 256-bit encryption algorithm, the same encryption NASA, the FBI and the Department of Defense uses to protect their data. Encrypting/decrypting takes one click. Free download.

DriveCrypt 4.61
DRIVECRYPT securely and easily protects all proprietary data on notebooks and desktop computers 100% of the time without users having to think about security. Any organization, from a small company to a large international firm with thousands of users in the field, can effectively protect business plans, client lists, product specifications, confidential corporate memos, stock information, and much more with this product.

Kremlin Encrypt (for Mac OS) 3.0
Kremlin builds a wall around your data, protecting your data from intruders. You can encrypt/decrypt files with RC4 and Blowfish in one click and securely delete files by dragging them to the Kremlin Secure Recycle Bin. The Kremlin Sentry schedules itself to secure your hard disk and memory to wipe all records of your activities. Kremlin Text is a secure word processor with encrypted e-mail capabilities.

Keynesis Lockngo Professional 3.10
Lockngo Professional encrypts and password protects flash drives, portable drives and external disks using 256-bit AES military specification unbreakable encryption with a wiping mechanism that writes random data on deleted files so that they cannot be restored. Lockngo Professional is offering this level of security while running directly from the removable drive with no installation. Lockngo Professional is fast, smart and Very easy to use.

CryptoExpert 2008 Professional 7.7.1
CryptoExpert creates new virtual hard drives on your computer that appears to applications like any other physical drive. User needs to enter a password to work with the encrypted drive and can unmount it instantly by pressing special hot key. In the unmounted state there are no enrypted virtual hard drives in your system. CryptoExpert works well on Windows Vista 64bit and 32 bit as well as on WinXP/2000/2003. New feature: Disk Firewall.

Digital Secure Disk 1.5
SafeIT Secure Disk is a user-friendly program that allows you to prevent unauthorized access to restricted documents. The program makes a part of your current hard disk a secure disk. All private and confidential information stored on this disk will be protected using strong encryption. Your secure disk is only accessible by entering the correct password. The user friendly interface makes securing a file as easy as copying it.