Defraggler from Piriform is unique application that allows you to defrag files without having to defragging the whole drive. Most defrag tools only allow you to defrag an entire drive. Defraggler lets you specify one or more files, folders, or the whole drive to defragment.
In just a moment you can see how and what is fragmented on your hard drive. With this application tool it gives your hard drive a quick one touch quick defrag. So while you are not using the computer you can set the computer to defraggle and walk away and come back to a computer that is running much faster and smoother.
Defraggler is from Piriform which also came out with one of my favorite programs called CCleaner. Both these programs are completely free.
Download Defraggler
Related post: CCleaner