- Anonym.to - Prevents a site from appearing in the server logs of referred pages as a referrer.
- BrowserSpy.dk - Free service to show web surfers how much information their browser can reveal about their system when visiting normal web pages.
- IDzap - Provides a free anonymous web surfing service and a list of resources for anonymous use on the Internet. Registration required. Also offers anonymous webhosting.
- Onion Routing - A product of the US Navy Research Lab, the Onion Routing is an Internet based system to prevent eavesdropping and traffic analysis attacks. It is now "off-line" but listed in the ODP for completeness and potential new developments.
- Piriform: CCleaner - Freeware system optimisation and privacy tool that erases Internet history and other unused files, and cleans up orphaned registry entries. [Windows]
- Spam Mimic - Hides short messages in a fake spam; the recipient can decode them after receiving the real-looking "unsolicited commercial e-mail".
