Hard Disk Scrubber!

Dariks Boot and Nuke ("DBAN") is a self-contained boot disk that securely wipes the hard disks of most computers. DBAN will automatically and completely delete the contents of any hard disk that it can detect, which makes it an appropriate utility for bulk or emergency data destruction.

WipeFile erases files and folders secure and fast. WipeFile overwrites the information completely, so there is no way to undelete the files or reconstruct the file content.

Permadelete is a free and open source file shredder, it deletes your files beyond recovery. It's made to be beautiful and easy to use and yet powerful.

HDShredder deletes the contents of hard disks and other mass storage media reliably at the physical level. HDShredder can also be applied to individual partitions and the user can select to perform the deletion according to international security standards. HDShredder works independent of partition layout, file sys­tem and operating system. It also works with proprietary formats which otherwise would be inaccessible.

SDelete, short for Secure Delete, is a command-line based data destruction tool and can be run from the Command Prompt in Windows 7, Vista, or XP.

The easiest way to get rid of the sensitive data from a Mac before letting it go is to wipe it with Stellar File Eraser tool. It consists of 12 efficient Standard DoD wiping algorithms. It even wipes out locked files, give it a free trial.

Don't give away sensitive information, valuable corporate trade secrets, business plans, personal files and letters, or traces of Internet or newsgroup activity with the old computers that you or your company resells, donates, reassigns to different departments or removes from operation. Deleting all the files or even formatting the hard disk is not enough to stop people to restore information using basic recovery programs. east-tec DisposeSecure however removes all traces of data from the computer hard disk, by overwriting and destroying beyond recovery every sector and bit of information. Data is removed according to government and industry standards or custom user security levels. east-tec DisposeSecure can be operated either from a bootable media (USB stick, floppy disk, CD, DVD) to sanitize any drive or partition from the computer, or through the network to sanitize a large number of computers, centralize sanitization logs (reports) on the server and more. The computers can be sanitized regardless of the file system or the operating system. In the latest version, you can also wipe non-system external hard drives directly from Windows, without booting from another device. Whether you want to prevent identity theft, protect your privacy or stop competitors from stealing your sensitive information, east-tec DisposeSecure offers the solution. »

Blancco Drive Eraser is patented secure data erasure for HDDs and SSDs. Digitally signed certificate of erase for auditing. Free evaluation license.

ISO files: ftp://ftp.gnome.org/mirror/temp/sf2015/e/er/erace/