From Citizendium, the Citizens' Compendium
- See also changes related to Wikipedia, or pages that link to Wikipedia or to this page or whose text .
- Encyclopedia : A point of reference for structured knowledge.
- Wiki : A website that allows anyone (with registration required or not) to edit any page and to add new pages.
- Wikimedia Foundation : Charitable foundation which operates Wikipedia and other projects.
- Inclusionism : Belief that Wikipedia and other online encyclopedias should include a lot of material that others think should be deleted.
- MediaWiki : Wiki engine used to power Wikipedia and Citizendium; open source and written in PHP.
- Wikiscanner : A website created by Virgil Griffith to reveal conflict of interests when anonymous Wikipedia users edit an article.
- Truth in Numbers : 2010 American documentary film about Wikipedia, directed by Scott Glosserman and Nic Hill.
- Jimmy Wales : (1966–) Internet entrepreneur and co-founder and head of Wikipedia, and co-founder of Wikia.
- Larry Sanger : American former philosophy professor who co-founded Wikipedia and founded Citizendium as an alternative (born 1968).
- Citizendium : On-line encyclopedia project: a wiki that allows registered, non-anonymous authors to edit any article, with the results approved by qualified editors.
- Conservapedia : Conservative wiki encyclopedia project founded by Andrew Schlafly as an alternative to Wikipedia and its "liberal bias", instead preferring conservative Christian and Republican Party viewpoints.
- Nupedia : Online encyclopedia founded in 2000 by Jimmy Wales and edited by Larry Sanger, considered the forerunner to Wikipedia.
- Web 2.0 : A description of the WWW that allows for greater social interaction between producers and consumers, authors and readers of content, to the point where such distinctions become meaningless.