OW Shredder is described as 'powerful security tool, that allows you to completely erase sensitive data from your computer. Individual files, free disk space, and entire volumes get erased securely' and is a File Shredder in the Security & Privacy category. There are more than 10 alternatives to OW Shredder for a variety of platforms, including Windows, Mac, Linux, Android and iPhone. The best alternative is Eraser, which is both free and Open Source. Other great apps like OW Shredder are Permadelete (Free, Open Source), Active@ KillDisk (Freemium), Alternate File Shredder (Free, Open Source) and iShredder (Paid).
This program offers the possibility to finally delete files and/or folders (no recovery possible). The program also can overwrite the free space on a drive, which means, that already deleted files cannot be restored, too.
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.
BitRaser File Eraser is a DIY software for permanent wiping of sensitive files, web browsing history, app & system traces, and unused space on the laptop, desktop, and external storage media. The tool safeguards your personal data from falling into the wrong hands.