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.

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.

Global Voices is an international community of bloggers who report on blogs and citizen media from around the world