Forensics and Anti-Forensic Degaussers

Data Devices International
Offers a variety of degaussers, hard drive erasers, duplicators, tape cleaners, and other data security products and devices.
Data Security, Inc.
Supplier of degaussers approved in the National Security Agency (NSA) Degausser Evaluated Products List (DEPL).
Digital Intelligence
Provides computer forensics training, hardware, software, services, and technical support.
Open Source Digital Forensics
Reference site for the use of open source software in digital investigations. Features open source tools, research papers, test images, and procedures.
Sleuthkit.org
Offers open source digital investigation tools for Windows and Unix systems.