Italian

Blablacar

BlaBlaCar is a trusted community marketplace that connects drivers with empty seats to passengers looking for a ride. It was a community platform Covoiturage.fr created in 2004 by Frédéric Mazzella, and it became a payed service platform in 2011.

Drupal

Drupal is a free software content management framework maintained and developed by a community of more than one million users. It is used as a back-end framework for at least 2.1% of all websites worldwide ranging from personal blogs to corporate, political, and government sites including whitehouse.gov and data.gov.uk. It is also used for knowledge management and business collaboration. More than one million websites are currently powered by Drupal, according to the statistics provided by Drupal.org.

Kune

Kune is a free/open source distributed social network focused on collaboration rather than just on communication. That is, it focuses on online real-time collaborative editing, decentralized social networking and web publishing, while focusing on workgroups rather than just on individuals. It aims to allow for the creation of online spaces for collaborative work where organizations and individuals can build projects online, coordinate common agendas, set up virtual meetings, publish on the web, and join organizations with similar interests.

Skype

Skype is a freemium voice-over-IP service and instant messaging client, developed by the Microsoft Skype Division. Is a hybrid peer-to-peer and client–server system. It makes use of background processing on computers running Skype software, and this is reflected in Skype's original proposed name of Sky Peer-to-Peer.

Wikipedia

Wikipedia is a collaboratively edited, multilingual, free Internet encyclopedia that is supported by the non-profit Wikimedia Foundation. Volunteers worldwide collaboratively write Wikipedia's 30 million articles in 287 languages, including over 4.4 million in the English Wikipedia. Anyone who can access the site can edit almost any of its articles, which on the Internet comprise the largest and most popular general reference work, ranking sixth globally among all websites on Alexa with an estimated 365 million readers.

Vuze

The Vuze Bittorrent Client is an end-to-end software application.

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There are currently 385 Commons-Based Peer Production cases!