We propose a decentralized privacy-preserving approach to spam filtering. Our solution exploits robust digests to identify messages that are a slight variation of one another and a peer-to-peer architecture between mail servers to collaboratively share knowledge about spam
Noserub is a protocol and reference implementation for a decentralized social network service. Its basic principle is an openness to other social network services so that information can be shared more easily without having to register and actively monitor each one.
The Netsukuku project is based on the very simple idea of exploiting the great potentiality of the wifi connectivity, making the PCs of wireless communities act as routers and handle together an ad-hoc network even bigger than the Internet.
Netsukuku is an ad-hoc network system designed to handle massive numbers of nodes with minimal consumption of CPU and memory resources. It can be used to build a world-wide distributed, fault-tolerant, anonymous, and censorship-immune network, fully independent from the Internet.
Diaspora (currently styled diaspora* and formerly styled DIASPORA*) is a nonprofit, user-owned, distributed social network that is based upon the free Diaspora software. Diaspora consists of a group of independently owned pods which interoperate to form the network. As of September 2013, there were estimated to be more than 405,000 Diaspora accounts
The P2P-Next integrated project will build a next generation Peer-to-Peer (P2P) content delivery platform, to be designed, developed, and applied jointly by a consortium consisting of high-profile academic and industrial players with proven track records in innovation and commercial success
Tribler is an open source peer-to-peer decentralized client with various features for watching videos online. The user interface of Tribler is very basic and focused on ease of use, instead of diversity of features. Tribler is based on the BitTorrent protocol and uses an overlay network for content searching, which makes the program operate independent of external websites and renders it immune to limiting external action, for example, government restraint. Due to this overlay network Tribler does not require an external website or indexing service to discover content.
Usenet is a worldwide distributed Internet discussion system. It was developed from the general purpose UUCP dial-up network architecture. Duke University graduate students Tom Truscott and Jim Ellis conceived the idea in 1979 and it was established in 1980. Users read and post messages (called articles or posts, and collectively termed news) to one or more categories, known as newsgroups. Usenet resembles a bulletin board system (BBS) in many respects, and is the precursor to Internet forums that are widely used today.