Where to get best hard drive data eraser software?

I am looking for the best but affordable data eraser software. Is there any one who can suggest me one data eraser program to wipe data from hard drive.

Several ways to erase data depending on paranoia levels …

WD Data Lifeguard Diagnostics (FREE) … and do a low level format and zero fill (which will take a long time)


Plenty of other FREE 3rd Party Software that can erase data and use advanced shredding algorithms (Dod 5220-22.M) which is Military Grade and will take a long long time.

But, If you want to erase data making it 100% unrecoverable … then a hammer followed by fire and then hydrochloric acid is the only way to make the data 100% unrecoverable.