There's also Tor if you don't want to sign in with an account:
Tor (anonymity network) - Wikipedia, the free encyclopedia
It's extremely slow and some exit nodes were blocked by Google when I tried it out. A visit to the "What's my IP" site through the network turned up something in Israel IIRC, but of course it's luck-of-the draw as to where your exit node is. Again no unencrypted user info through it since lots of organizations monitor exit node traffic