On: Never again be thwarted by restrictive “guest” wifi (e.g. on buses or airplanes)

[jamescun]

You can also configure any OpenSSH Server/Client (v4.3 or greater) into a fully-fledged VPN (as opposed to port tunnelling). Granted there are more steps involved in connection than say, OpenVPN, however it is still relatively simple and you get a nice little VPN.