Tor project is yet another solution to get anonymity in the WWW. Here what they say:
Tor is free software and an open network that helps you defend against a form of network surveillance that threatens personal freedom and privacy, confidential business activities and relationships.
Tor protects you by bouncing your communications around a distributed network of relays run by volunteers all around the world: it prevents somebody watching your Internet connection from learning what sites you visit, and it prevents the sites you visit from learning your physical location. Tor works with many of your existing applications, including web browsers, instant messaging clients, remote login, and other applications based on the TCP protocol.
I have never been used Tor for myself. But idea as I get it is very good and approach of its realization is interesting. You can read more about it on Tor’s overview page. In few words it works like this. There is a set of computers that have installed Tor and all of them are united in one network. Instead of establish direct connection to some web site you can use that network. Thus you request and site’s respond go through the network of several computers. Each time you request another web page the overall path is changing. So it looks like the fluid proxy network.
Tor work process
