Free defragmentation software software for windows

DefragMentor Lite CL is a free command line file defragmentation tool that will help you defragment a single file or a group of files as well as to obtain information on file and disk fragmentation. DefragMentor Lite CL (where CL stands for Command Line) is a perfect tool for automated file-based defragmentation.
Even if you defragment the entire disk on a regular basis, some frequently changed files become fragmented long before the next launch of disk defragmenter. So you can use DefragMentor Lite CL to optimize placement of individual files thus reducing access time and improving overall performance of your system. Database files of any kind (especially large ones) are the best example of what DefragMentor Lite CL can optimize.
Instead of running DefragMentor Lite CL manually every time you need to defragment files you can schedule a task, which Windows will run for you automatically at any convenient time. Use the standard Windows task scheduler if you want to work in this way.

Power Defragmenter is a very advanced GUI for the Sysinternals core application which takes defragmentation process to a whole new level.
Power Defragmenter is a GUI (Graphic User Interface) application for program Contig by Sysinternals.
Contig is a very powerful defragmentation application designed for Windows NT/2000/XP operating systems.
Contig created by Mark Russinovich and Bryce Cogswell.

Buzzsaw On-The-Fly Defragmenter allows you to defragment your drive while you work.
Buzzsaw had on-the-fly defragmentation before any defragmentation program on the market made it available. This program runs at idle priority so you can continue working without Buzzsaw using your valuable CPU time. It watches the drive for modified files and waits approximately 60 seconds before defragmentation begins.
It waits, because you may be downloading a file, etc. and there is no need to defragment the file if it is going to be modified again shortly. If you are a developer, you may be compiling files, or saving files frequently which is another reason for delayed defragmentation.

StartDefrag can automate scheduling of HDD defragmentation on the Windows operating system.
The standard disk defrag software included with the OS does not support scheduling. Many Windows tips articles recommend defragmenting your hard drives regularly.
Note: Free for personal use
Main features:
- easy to install, use, and deploy within a business environment
- informative graphical user interface

JkDefrag GUI 1.06 is a useful software built for the open source hard drive defragmentation program JkDefrag.

It enables users to easily use JkDefrags powerful defragmentation operations, schedule defrags, perform system file defrag operations on startup, as well as set a wide spectrum of defrag options.

It can also be used to quickly install JkDefrags screensaver defrag, an option that kicks in the defrag process and displays it as a screensaver whenever the computer is idle.