JkDefrag 5

This portable software I keep in my USB toolbox all the time. The program represents one of the best free defragmenters and optimizers for all versions of Windows, starting form 2K. The software is completely automatic, user-friendly, and fast, while not imposing the heavy load on the computer resources. Defragmenter is able to handle not only fixed, but also removable drives, like USB or memory sticks, offering to the advanced user several optimization strategies to choose from.
Third-party GUI were developed, and can be found on my page:
http://freeware4review.blogspot.com/2008/01/jkdefra g-defragmeter.html