http://dd-wrt.com/site/index : changing router firm-ware to work with VPN service
http://techpp.com/2009/07/09/top-5-free-vpn-clients/ VPN clients . . .
some other services(http://www.how-to-hide-ip.info/2010/04/12/7-good-strongvpn-alternatives/)

Strong VPN(http://strongvpn.com/)
modified router(http://www.sabaitechnology.com/category-s/22.htm)