When a file is written to your hard drive, it is often stored in pieces, creating a fragmented file. Defragmentation software can organize these split-up files which can sometimes dramatically improve system performance.
Below you'll find reviews I've done of defragmentation programs, as well as lists of the best defrag software.
Raxco PerfectDisk 10
My review of Raxco PerfectDisk 10, a disk defragmentation software program.
Raxco PerfectDisk 8
My review of Raxco PerfectDisk 8, a disk defragmentation software program.
My review of Diskeeper 2007, a disk defragmentation software program.