UltraDefrag is a powerful Open Source Defragmentation tool for Windows Platform. It is very fast, because the defragmenting is done via the kernel-mode driver. There are three interface available : Graphical, Console and Native.
1. graphical interface was completely rewritten
2. gui program was translated into the following languages:
Danish, Farsi, Swedish, Turkish
3. a lot of GUI bugs were fixed
4. very important driver bugs were fixed
Tools and Utilities
Product page: here