Tor is a toolset for a wide range of organizations and people that want
to improve their safety and security on the Internet. Using Tor can help
you anonymize web browsing and publishing, instant messaging, IRC,
SSH, and other applications that use the TCP protocol. Tor also
provides a platform on which software developers can build new
applications with built-in anonymity, safety, and privacy features.

Tor requires the libevent library which is also available from SlackBuilds.org.