UltraDefrag is powerful Open Source defragmentation tool for Windows NT. It is very fast, because the defragmenting is done by kernel-mode driver. They are three interfaces to them: graphical, console and native. The GUI is very useful, because it represents your filesystem visually as a color coded cluster map. The console is another option for those that prefer the command line. It is also allows you to run UltraDefrag from the task scheduler and scripts. Finally, the native executable will run at boot time in a manner similar to chkdsk.

Changelog:
all modules was internally completely redesigned;
full NTFS junctions (reparse points) support!
many bugs are fixed; documentation improved;
full optimization performed; portable application
simplified; full WinDDK support for compilation;
gui improved with new list of volumes;
console program improved with new useful options;

Program Information Category: Tools and Utilities Type: Free Version: 1.2.2 Size: 181KB Works on: Windows Product page: here