And in your opinion what is the Defragmenter better???

defrag.exe?
\r
To the side whisper: the best possible is one that is not needed. Vivat ext3,4/reiser/xfs/etc.!

A built-in Defragmenter of Windows No. 7. I have a computer running around the clock, a lot of documents. Fragmentation 0%. It is itself, when necessary, defragmentare.

MyDefrag
\r
PS Viva the ssd also does not need Defrag. Regardless of the file system.

Defraggler — simple, there is portabl and/or x64 version, fast in defrag only mode (without ordering), you can selectively mark the files and daws, orderget only their (what is missing in many paid).
In General vindovs starts defraging when she notices that the user has departed, so the problem usually does not arise.

Package TuneUp Utilites is quite smart Defragmenter. + a lot of utilities for cleaning and optimization of the whole system. Pay

Raxco Perfectdisk. By the way, the Windows Defragmenter uses developed by the company, engine.

O&O Defrag Pro is shareware, but the benefits for a long time with pleasure