[–] FriedFood100 0 points 4 points 4 points (+4|-0) ago
A darknet (or dark net) is an overlay network that can only be accessed with specific software, configurations, or authorization, often using non-standard communications protocols and ports.
Active Examples
Tor (The onion router) is an anonymity network that also features a darknet - its "hidden services". It is the most popular instance of a darknet.
I2P (Invisible Internet Project) is another overlay network that features a darknet whose sites are called "Eepsites".
Freenet is a popular darknet (friend-to-friend) by default; since version 0.7 it can run as a "opennet" (peer nodes are discovered automatically).
RetroShare can be run as a darknet (friend-to-friend) by default to perform anonymous file transfers if DHT and Discovery features are disabled.
GNUnet is a darknet if the "F2F (network) topology" option is enabled.
Zeronet is open source software aimed to build an internet-like computer network of peer-to-peer users of Tor.
Syndie is software used to publish distributed forums over the anonymous networks of I2P, Tor and Freenet.
OneSwarm can be run as a darknet for friend-to-friend file-sharing.
Tribler can be run as a darknet for file-sharing.