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 commandline 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.

一個免費的基于GNU General Public License的Windows磁盤整理和優(yōu)化軟件，支持Windows 2000/2003/XP/Vista/X64。全自動并非常易于實用，并支持USB磁盤和存儲卡的整理，它利用微軟的標(biāo)準(zhǔn)磁盤整理API制作，整理磁盤徹底，對NTFS的兼容性好并且不損害數(shù)據(jù)。

Download : JkDefrag 3.14 | 64-Bit
HomePage: http://www.kessels.com/JkDefrag/

JGDefragGUI, This program is a GUI for the Opensource Defrag program jkdefrag.

Download: http://www.paehl.com/open_source/?JGDefragGUI