Windows 7 A Handy defrag tool and its free !

[whoosh]

Link Removed

Can defrag individual files too !

 

[nwg]

I also like the free Auslogics Disk Defrag. It is fast too.

Disk Defrag - Reclaim the Speed Of Your Disks

 

[reghakr]

Yes, I use Defraggler also and it seems to do the best job.