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 two 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 screensaver version, a DLL library (for use from programming languages), and versions for Windows X64. JkDefrag is based on the standard defragmentation API by Microsoft, a system library that is included in Windows 2000, 2003, XP, and Vista. 

Changes in this version:

- The NTFS analysis code now also interprets Inodes 12 to 23.
- Fixed a problem that caused the NTFS analysis code to malfunction on a-typical NTFS disks.
- The icon now also shows in the taskbar and the upper-left-hand corner of JkDefrag's window.
- Softened the messages generated by the NTFS analysis code.

JkDefrag 3.20

JkDefrag 3.20 (Windows x64)