PerfectDisk
PerfectDisk
+1Not free but...
O&O Defrag Professional
It's the first 3rd party program which I have noticed a difference.
PerfectDisk
Have tried most of the free one's, but got to say Perfectdisk 10 is a good piece of software put it on auto and Bob's your Aunty you just forget about it. It's been running for 3 months with no prob's at all.