Tor is a free open-source application used for internet anonymity and anti-censorship.
TOR Project (originally short for The Onion Router) is software for enabling online anonymity. It directs Internet traffic through a free, worldwide volunteer network consisting of thousands of relays to conceal a user's location or usage from anyone conducting network surveillance or traffic analysis.
Tor is free to download and an open network that helps you defend against location snooping and browsing analysis, a form of network surveillance that threatens personal freedom and privacy, confidential business activities and relationships, and state security.
It protects users by bouncing their communications around a distributed network of relays run by anonymous volunteers all around the globe. It prevents somebody watching users Internet connection from figuring out what websites they visit, and it prevents the websites they visit from learning the users physical location.
TOR is for web browsers, instant messaging clients, and more. It is available for Windows, Mac, Linux/Unix, and Android.