UltraDefrag is an open source defragmentation tool. Its engine is very fast, because it is created as kernel-mode driver. They are three interfaces to them graphical, console, and native. UltraDefrag reduces the file fragmentation, thus it makes disk operations faster. Also the program can optimize a whole disk placing all the files to the fastest part of the disk - to its beginning.
What's new in this version:
Version 5.0.6 has added "Debug" item to the help menu and "View change log", "View translation report", and "Submit current translation" items to language menu.