It has been a month since I mentioned 3 free Disk Defragmenting Software, and adding to that list here is another free but powerful defragmenter that will throw all your fragmentation problems.
The tool is called UltraDefrag short for Ultra Defragmenter and is claimed to be the powerful Open Source defragmentation tool for Windows. It is believed to be faster than the rest defragmenters because in this the defragmenting is done by kernel-mode driver.
You can use the tool in three of its interfaces: graphical, console and native. GUI will feel better to the eyes while command line will feel comfortable to those working on command line all the time.
It contains no unnecessary stuffs but is a small and powerful defragmenter for Windows of all bits.