Make sure your deleted files are really gone with this $40 data shredder stick

TL;DR: The Data Shredder Stick Secure Data Wiping Tool can wipe hard drives on Windows PC’s for just $39.99 (MSRP $59.99).
Business Insider

Data Shredder iOS 2: Securely Wipe iPhone & iPad with Military Grade Data Deletion

MIAMI, Nov. 6, 2017 /PRNewswire/ -- ProtectStar is proud to release a new update v2.1 of Data Shredder for iOS, their data erasing utility that securely wipes data on any iPhone, iPad, and iPod touch.
Hosted on MSN

Permanently Erase Files or Entire Drives With This Pocket-Sized Data Shredder—Now $29.99

Drag files to your computer’s trash, and they’re not really gone—most can be recovered with basic tools. Whether you’re wiping a single file or scrubbing an entire hard drive, the Data Shredder Stick ...
Engadget

Mac App of the Week: File Shredder helps you securely delete files

Cleaning off my hard drive this week, I discovered a few years' worth of tax documents in a long-forgotten-about folder. As I prepared to toss the folder into the trash, I paused to consider whether ...
Lifehacker

Securely Delete Files with DeleteOnClick

Windows only: Freeware shell extension DeleteOnClick adds a Securely Delete entry to your Windows Explorer right-click menu so you can securely wipe files from your hard drive. How securely, you ask?