A friend of mine recommended http://www.vpnbook.com/freevpn as an easy way to get out of uncensored internet.  I also found SoftEther which is a VPN project that provides a few VPN protocols.  That way if one is being blocked you can try another.  Another interesting project I found was tinc.  This seemed a bit old.  However, due to the obscurity of the implementation it is probably not blocked.  A hacker vpn called ChaosVPN also seems a bit extreme.

http://samy.pl/ has some interesting networking tools to get around firewalls and other network and hacking type tools.

All of this is due to the fact that I want to be able to remote desktop to a friends computer on a computer that sits behind a firewall.  Which made me think that oh I might be going to China and I would like to be able to get on gmail while there.  So, I looked into vpns!