Apps similar to nwipe include Darik's Boot and Nuke, which is open source with a free version. Other options are HDShredder Free, ABAN and Shredos. In total there are four File Shredders like nwipe for Windows, Linux and Mac.
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...
United States
HDShredder Free Edition securely erases data from hard drives, SSDs and other storage media. It works independently of the file system and operating system, making it easy to wipe entire drives before disposal, recycling or resale.
Germany
EU
ABAN is a boot CD/USB stick for easily and securely wiping all the disks in a machine. Boot disks are available for both 32-bit and 64-bit machines. As a boot disk, it doesn't care what OS is on the machine (or if there is any OS at all).
Shredos Disk Eraser 64 bit for all Intel 64 bit processors as well as processors from AMD and other vendors which make compatible 64 bit chips. ShredOS - Secure disk erasure/wipe.
