Cryptop
- Laptop/workstation disk encryption software using USB tokens and intrusion detection/prevntion features, running on a virtual operating system.
- http://en.cryptop.nl

Abit SecureIDE
- IDE hard drive encryption card uses DES with 40-bit key stored on a USB dongle.
- http://www2.abit.com.tw/page/en/multimedia/multimedia_detail.php?pMODEL_NAME=SecureIDE&fMTYPE=Encryption+Device

Bosanova Inc.
- Storage encryption hardware appliances which provide security for back-up data and integrated security solutions for any platform.
- http://www.theq3.com/

FreeOTFE
- Free "on-the-fly" transparent disk encryption program for both PCs and PDAs, allowing the creation of one or more encrypted "virtual disks". Offers extensive features and full source code.
- http://www.FreeOTFE.org/

CryptDisk.4h
- It is a virtual disk based encryption tool that runs under Windows. CryptDisk.4h uses a file as virtual logic drive and mounts it as a real one.
- http://cryptdisk.4hack.com/

CryptArchiver
- A disk encryption system supporting a less conventional user interface, and means of managing encrypted disk images
- http://www.winencrypt.com/

CrossCrypt
- One of the few open source disk encryption systems. This system also supports mounting Linux encrypted disk images
- http://www.scherrer.cc/crypt/

Clemens Fruhwirth
- Project developing a hard disk encryption system using LUKS (Linux Unified Key Setup).
- http://clemens.endorphin.org/cryptography

Secure Systems Limited
- Supplier of Silicon Data Vault encryption device that connects into the IDE cable and requires a password at boot time to decrypt the hard drive. Uses 128-bit AES and is designed to meet FIPS 140-2.
- http://www.securesystems.com.au

Stonewood Flagstone
- Supplier of encrypted hard drives from 30-120 Gb including FIPS 140-2 certified devices.
- http://www.flagstonesecure.com

ScramDisk
- A hard drive encryption program that runs under Windows 95 & 98 and provides a number of high security ciphers including 3DES, Blowfish and IDEA.
- http://www.scramdisk.clara.net/

TurboCrypt
- Creates encrypted disk drives which can be mounted at any time.
- http://www.turbocrypt.com/

TrueCrypt - free open-source disk encryption
- TrueCrypt can create a virtual encrypted disk within a file and mount it as a real disk. It can also encrypt an entire hard disk partition or storage device. Supports plausible deniability.
- http://www.truecrypt.org

SafeBit
- SafeBit features military strength on-the-fly AES encryption, by creating virtual disk drives, where you can hide files and folders.
- http://www.safebit.net

The CryptoGraphic Disk Driver
- Short description of The CryptoGraphic Disk Driver (CGD) for NetBSD and a reference to the FREENIX paper written about it.
- http://www.imrryr.org/~elric/cgd/

Safeguard Data Encryption Software from Utimaco
- Describes Utimaco data encryption software offerings for the U.S. market. Offerings include full hard disk encryption, LAN security, PDA Security, file encryption, email encryption, and hard disk partioning solutions.
- http://www.safeguard-utimaco.com

Tiasoft Security software
- Encryption application that supports encrypted logical drives.
- http://www.tiasoft.com

Real-Time Hardware IDE/SATA encryption
- Enova Technology specializes in developing,manufacturing and marketing real-time hard disk encryption chipset.
- http://www.enovatech.net/

SpyProof!
- Disk drive that automatically encrypts all data blocks written to it and then transparently decrypts them for any application, if logged in. Once logged out, the special disks are completely unreadable by unauthorized users and thieves.
- http://www.infoseccorp.com/products/spyproof/contents.htm

DriveCrypt - real time - hard disk encryption
- 1344 Bit, Military strong, transparent real time Hard Disk encryption.
- http://www.securstar.com/

PGP
- PGP products keep your confidential information secure.
- http://www.pgp.com

SafeBoot Security System
- Control Break provides encryption and security tools which are both secure, and easy to administer - designed primarily for the large enterprise, they also offer a range of consumer verisons.
- http://www.safeboot.com

dLock
- Hard Disk encryption kit, the hardware solution for PC data security.
- http://www.dlock.com.tw

CyProtect Disk Encryption
- Polymorphic on-the-fly harddisk encryption developed by CyProtect AG. Easy to use and 100% secure. It is possible to encrypt your data on external (USB or Firewire) and internal harddisks.
- http://www.cyprotect.com

GDI Technology, Inc.
- Real-time hard drive encryption kits external TV box.
- http://www.gditech.com

Sentry 2020 for Windows XP/W2K/NT
- The first security system that protects volumes, files, folders and programs quickly and easily
- http://www.softwinter.com/sentry_nt.html

Data Encryption Systems
- Sells software protection devices, copy protection, license management and encryption technology and anti-piracy solutions.
- http://www.dataencryptionsystems.co.uk

Secure FileSystem (SFS) for DOS/Windows
- Create and manage a number of encrypted disk volumes. Runs under both DOS and Windows 9x. Not updated since '96
- http://www.cs.auckland.ac.nz/~pgut001/sfs/

PGPDisk v6.0.2i
- As of version 6.5, PGPdisk is not longer included with the freeware versions. If you want PGPdisk 6.5 or later, you are required to buy one of the commercial versions. However, v6.0.2i is available here in both mac and pc versions.
- http://www.pgpi.org/products/pgpdisk/

Crypto CD
- A comprehensive archive of cryptography programs. Includes a lot of filesystems. (Available on CD or their ftp site)
- http://www.cryptocd.org/

Secure Drive 1.4
- Dos TSR program that can encrypt both floppy and hard disk partitions. Compatible with PGP 2.x keyfles. I have used this and it works great. Unfortunately it doesn't look like the programmer has made any enhancements to it for a while.
- http://www.stack.nl/~galactus/remailers/securedrive.html

Encryption Plus Hard Disk
- Delivers full hard disk encryption: automatic, on-the-fly data protection for your entire hard drive. Easy centralized administration for efficient corporate use.
- http://www.pcguardian.com

SafeHouse Hard Drive Encryption
- Transparent on-the-fly encryption of logical drives for Windows 3.1, 95, ME and 2000
- http://www.pcdynamics.com/SafeHouse/