A file defragmentation tool from Piriform, the company that brought you CCleaner and Recuva...

Defrag Individual Files
Most defragmentation tools only let you defrag the whole drive. Defraggler gives you the power to select individual files and folders to defrag. So you can get the job done in seconds, rather than waiting for the whole drive to complete. Of course if you want to defrag the whole drive Defraggler will let you do that too.

Compact and Portable
Defraggler was written in the same compact architecture as other Piriform products (CCleaner and Recuva). This results in a compact single EXE application, which can be copied to a thumbdrive and then used whenever you need it, without a complex installation process. The EXE itself is less than 1MB!

Vista Support
Defraggler supports all OSs released since Windows 2000, this includes Windows 2000, 2003, XP and Vista. 64-bit support has also just been added! Additionally Defraggler supports both NTFS and FAT32 file systems.

Locate Files on the Drive
After analysis Defraggler lists all the fragmented files on the drive. Selecting one or many will highlight their location on the disk. Allowing you to visually see the location of files on the disk.

Freeware
Why pay hundreds of dollars for a commercial defragmentation tool, when you can use Defraggler for free! This includes corporate use as well!