Disk Wipe!

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.

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.

Active@ Kill Disk is disk eraser software for secure formatting of hard drives without any possibility of following data recovery.

PartitionGuru is a partition management and data recovery program. In addition to traditional MBR partition table, it supports GUID partition table on GPT disks also. The free version is not able to convert a dynamic disk to a basic disk.

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.

EraserDrop Portable is an easy-to-use secure data removal tool. It is a drop target (a floating icon on your desktop) that you can drop files onto to quickly erase them so they can not be recovered. EraserDrop does away with the standard Eraser Portable interface and is packaged as a portable app so you can easily delete files on the go.

With xShredder you can destroy your sensitive files. Choose from simple destruction or shredding by Peter Gutmann 35 times.

File Shredder is a FREE and powerful application to shred and permanently remove unwanted files from your computer.In File Shredder you can choose between 5 different shredding algorithms, each one gradually stronger than the previous one.It also has integrated Disk Wiper which uses shredding algorithm to wipe unused disk space.

With Context-Shredder you can destroy your sensitive files. Choose from simple destruction or shredding by Peter Gutmann. Users can create deletion tasks, overwrite available free space or destroy disk drives.

BCWipe data wiping software enables you to permanently delete files selectively so that they can never be recovered or undeleted. BCWipe embeds itself within Windows and can be activated from the Explorer FILE Menu OR from the context (right-click) menu OR from BCWipe Task Manager OR from a command-line prompt. BCWipe complies with U.S. Department of Defense (DoD 5220.22-M) standard, U.S. Department of Energy (DoE M 205.1-2) standard and a set of other standard wiping schemes. You can also create and use your own customized wiping scheme to permanently delete files or wipe data and sensitive information from storage devices installed on your computer. »

When you normally delete your files in Mac OS X, the operating system is only forgetting where those particular files are placed, while the data still physically remains on the drive. Beginning with Mac OS 10.3, Apple enhanced its security by introducing the Secure Empty Trash feature, which follows the U.S. DoD pattern of overwriting data seven times.

O&O SafeErase gives you complete protection against unauthorized access to any confidential data you delete! No matter whether it’s outdated financial information, e-mail archives, or personal files, you can be sure that with O&O SafeErase this data will remain permanently deleted. That’s because O&O SafeErase doesn’t just delete data - it annihilates it, using six recognized and recommended deletion methods, including ones practiced by the U. S. Departments of Defense (DoD), and the German Department of Security in Information Technology (BSI). »