Hardwipe 3.0.3 + Portable | 5.9/6.3 Mb
Hardwipe can be used to permanently erase, or to "hard wipe", data on disk and portable storage media to prevent personal and sensitive business information from ever being recovered. Hardwipe can wipe entire drives, wipe files individually, and sanitize unused drive space. It supports right-click context menus within Windows file explorer, or can just be used as a standalone application.