UltraDefrag is a powerful, open source defragmentation tool for Windows. It´s engine is very fast, because it is created as a kernel-mode driver.

There are three interfaces to them: graphical, console and native. The first is very useful, because it uses cluster map visualization. Console is good for task scheduler, and native tool - for advanced users and programmers.

UltraDefrag´s design is very ergonomic: no skins, no localization, no animation and so on. It´s a truely small and powerful program!

It can be used on Windows 2000, Windows XP, Windows Server 2003 and Windows Vista. NT 4.0 support is currently unavailable.

Features:

* very fast defragmentation, because engine is kernel mode driver and has optimal algorithm.
* very small engine written in pure C language.
* nice graphical interface - compact and comfortable.
* safety, because file moving is realized with special system calls.
* simple to use.
* generate html reports.
* has useful filters.
* free: distributed with full source code under the GNU General Public Licens

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