JAP (called JonDo in the scope of the new commercial service JonDonym - AN.ON remains free of charge) makes it possible to surf the internet anonymously and unobservably.

Download: Macintosh. And to make it more easy you can install JonDoFox for Firefox. This make new user profile in Firefox. Just install this two application. It will do the rest.

My result: whatismyip: 118.96.*.* (before) - 141.76.*.* (after, using Technische Universitaet Dresden, free service)