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!

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