JKDefrag
JKDefrag is a free (released under the GNU General Public License) disk defragment and optimize utility for Windows 2000/2003/XP/Vista/X64. Completely automatic and very easy to use, fast, low overhead, with several optimization strategies, and can handle floppies and USB disks/sticks. Included are a Windows version, a command line version (for scheduling by the task scheduler or for use from administrator scripts), a screen saver version, a DLL library (for use from programming languages), and versions for Windows X64.
Even though its GUI looks very ugly… haha, But it really faster and reliable than window built in defragment tool.
on 