UltraDefrag is an open source defragmentation tool for Windows. The defragmention is done by kernel-mode driver and it is very fast, faster than the Windows defragmenter. UltraDefrag supports full defragmentation and space compacting.

You can use the filters to include/exclude files or folders based on the expressions that match file names (incl. path) or size (Kb | Mb | Gb | Tb) that you want to defragment.

UltraDefrag comes with three interfaces:

• Graphical – the GUI represents your filesystem visually as a color coded cluster map.
• Console – is an option for those that prefer the command line. It is also allows you to run UltraDefrag from the task scheduler and scripts.
• Native – the native executable will run at boot time in a manner similar to chkdsk.

UltraDefrag Defragmenter Features:

• Very fast defragmentation, the work is done via a kernel mode driver which has an optimal defraging algorithm.
• Very small engine written in pure C.
• Nice graphical interface – compact and functional.
• Safety, because the file moving is accomplished with Microsoft’s own Defrag API.
• Simple to use.
• Ability to generate html reports of fragmentation status.
• Ability to include/exclude files based on simple filters.
• Native x64 support.
• Free: Distributed with full source code under the GNU General Public License.

UltraDefrag is freeware and it works with Windows NT 4.0, Windows 2000, Windows XP, Windows Server 2003,Windows Vista and all of the 64-bit editions of Windows. You can download UltraDefrag from Sourceforge.net.