http://yyd7i3smkg2dgh3aiqhaw7l34imwa7xn75uaikqcd7umos6wxsml4bqd.onion
Although it is not Tor's primary purpose, as a side effect of its routing methods, it can also be used to set up "hidden services", or websites/services that can only be accessed through Tor. [Set up a Tor hidden service] [This site on Tor] [List of Tor sites] I2P is "an anonymous network layer (implemented as a Mix Network) that allows for censorship resistant, peer to peer communication.