1. Cisco Inc., Cisco visual networking index: forecast and methodology; 2009–2014.
2. Clarke I, Sandberg O, Wiley B, Hong TW. Freenet: a distributed anonymous information storage and retrieval system. In: International workshop on design issues in anonymity and unobservability; 2000. p. 311–20.
3. Edonkey. .
4. Gnutella. .
5. BitTorrent. .