alternative networks

http://en.wikipedia.org/wiki/Freenet

http://en.wikipedia.org/wiki/Darknet_(file_sharing)

http://en.wikipedia.org/wiki/Deep_web

http://en.wikipedia.org/wiki/Tor_(anonymity_network)

http://en.wikipedia.org/wiki/.onion

http://en.wikipedia.org/wiki/The_Hidden_Wiki

http://en.wikipedia.org/wiki/Silk_Road_(marketplace)