TOR

Tor is a system intended to enable online Anonymity, composed of client software and a network of servers which can hide information about users' locations and other factors which might identify them. Use of this system makes it more difficult to trace internet traffic to the user, including visits to Web sites, online posts, instant messages, and other communication forms.[5] It is intended to protect users' personal Freedom, Privacy, and ability to conduct confidential business, by keeping their internet activities from being monitored.[6] The software is open-source and the network is free of charge to use. Though the name Tor originated as an acronym of The Onion Routing project, the current project no longer considers the name to be an acronym, and therefore does not use capital letters. http://en.wikipedia.org/wiki/Tor_(anonymity_network)

Sept'2013: [[http://motherboard.vice.com/blog/tor-is-less-anonymous-than-you-think|less] anonymous than you'd hope