PGHammer, on 01 September 2012 - 18:59, said:
I've actually stayed with the included defragmenter - and I used to use Diskeeper with Windows 7.
The *why* is simple - Disk Optimizer (the Windows 8 defragmenter) is not only improved over the desk defragmenter in 7, it's even improved over Diskeeper Pro Premier (what I'd used with Windows 7).
It's the only free multi-pass defragmenter, first off.
It's the only multi-pass defragmenter that is entirely graphical - no text mode at all.
It's the only multi-pass defragmenter that does NOT require a reboot.
It's still written by Condusiv (the same folks that used to be Diskeeper Corporation) - and it's still part of the operating system.
I've been loyal to Diskeeper since 1999 - however, Disk Optimizer in Windows 8 has effectively mooted it.
I think I am just going to have to go with the native defragger, not that I've ever seen any bad press regarding the quality of Condusiv Diskeeper but as this Wikipedia page isn't disputed by Condusiv I would normally boycott their software if it wasn't already part of Windows.
While studying electrical engineering at Northwestern University in 1968, Craig Jensen took a night job as a computer operator to learn about computers. He went on to develop advanced operating systems for early technology pioneer Applied Data Research, and in 1974 moved to Data General Corporation. He founded Executive Software International in 1981, he says, "with an early personal computer and a box of file folders in his kitchen in Hollywood." Mr. Jensen stepped down as CEO in 2009.
He is the author of The Craft of Computer Programming (New York: Warner Books, 1985) ISBN 978-0-446-38147-5.
Craig Jensen, is a member of the Church of Scientology and a member of the World Institute of Scientology Enterprises (WISE), an international membership organization whose members use the management technology of L. Ron Hubbard, founder of the Church of Scientology. He has stated that his employees are schooled in Hubbard's management technology, with courses that include Effective Leadership, Executives and Ethics, Executive Basics and Management by Statistics. Jensen attributes much of his success in business to the use of this technology, saying "I attribute [our] success directly to the management technology developed by L. Ron Hubbard. Simply put, I couldn't have done it without his help." 
In 1991, the company (back then Executive Software) denied Ciba-Geigy technical support for the VAX version of Diskeeper after learning that Ciba-Geigy makes Ritalin, a drug opposed by scientologists (see also Scientology and psychiatry)."
As for the other suggestions I checked them all and none are officially compatible with W8 and I want that for intelligent features similar to 'Smart Placement' in Perfectdisk.