Rate Your Music (or RYM) is an online collaborative metadata database of musical and non-musical releases and films which can be cataloged, rated and reviewed by users. In RYM users rate and catalog releases, as well as write reviews, create lists and add artists and releases to the database.

OpenSubtitles.org offers direct downloads of subtitles written down by users.

Jamendo is a music website and an open community of music authors. It bills itself as "the world's largest digital service for free music". Since the beginning in 2005, Jamendo's music has been licensed under Creative Commons licenses.

The Debian Project is an association of individuals who have made common cause to create a free operating system. This operating system that we have created is called Debian. An operating system is the set of basic programs and utilities that make your computer run. At the core of an operating system is the kernel. The kernel is the most fundamental program on the computer and does all the basic housekeeping and lets you start other programs. Debian GNU/Linux is one of the most popular Linux distributions for personal computers and network servers.

Wikivoyage is a free web-based travel guide for travel destinations and travel topics written by volunteer authors. The project originated initially from a fork from Wikitravel in 2006. Later, after further tensions, forks and re-merging within the community, in Dicember 2012 the German association Wikivoyage e.V. and the English Wikitravel community moved all the projects operations in order to be hosted by the Wikimedia Foundation, the non-profit organization hosting several of the world's largest wiki-based communities such as Wikipedia.

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 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 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.

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.