X-FreeOTFE

Made as a portable edition of FreeOTFE, X-FreeOTFE is a simple-to-use piece of software that allows you to encrypt multiple virtual disks on your computer, "on the fly encryption" (OTFE).

It doesn't integrate overly complicated options or configuration parameters, making the app accessible to all kinds of users, even those less experienced with disk mounting software.

As there is no setup pack involved, you can save the program files anywhere on the disk and just click the executable to launch X-FreeOTFE, as long as you have administrative privileges. Otherwise, you can copy it to a pen drive to directly run it on any PC effortlessly. It doesn't modify Windows registry settings.

The GUI is pretty simple to navigate, consisting of a single window that lets you seamlessly mount a file or entire partition, overwrite free space or the entire drive, format drives, as well as to dismount all or just the selected partition.

When it comes to the encryption methods, X-FreeOTFE offers support for AES, Blowfish, RC6, CAST and DES, among others. Moreover, the app can create key files required for decrypting a volume, and you can modify password details anytime. Hotkeys are available for dismounting all drives.

No error dialogs were shown in our tests, and the tool didn't hang or crash. It had a good response time and low impact on computer performance. Although it may appear difficult to work with, X-FreeOTFE is actually rather user-friendly, and you can always consult the help manual to clarify any issue. Plus, it's free.