Mentioned the Tor Project in a recent post so decided to expand a little upon the topic. 
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, and state security known as traffic analysis.
It is a browser that exists on your machine, but is not installed as such, so can be placed on a USB key and used as a remote app. Its’ purpose is to anonymise your web communications by bouncing then around a distributed network of relays 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.
Useful for accessing sites that may be blocked by you ISP for what ever reason.