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Diaspora*

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

P2P-Next

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

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

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.[1] 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.

Seventeen or Bust

Seventeen or Bust is a distributed computing project started in March 2002 to solve the last seventeen cases in the Sierpinski problem. The project has solved eleven cases, and continues to search for solutions to the remaining six

Zotero

Zotero is a free and open-source reference management software to manage bibliographic data and related research materials.

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There are currently 385 Commons-Based Peer Production cases!