From Citizendium, the Citizens' Compendium
- Internet : International "network of networks" that connects computers together through the Internet Protocol Suite and supports applications like Email and the World Wide Web.
- Website : A collection of pages that provide content.
- Ward Cunningham : Add brief definition or description
- Wikimedia Foundation : Charitable foundation which operates Wikipedia and other projects.
- Atlassian Confluence : Add brief definition or description
- DokuWiki : Add brief definition or description
- Instiki : Add brief definition or description
- MediaWiki : Wiki engine used to power Wikipedia and Citizendium; open source and written in PHP.
- PhpWiki : Add brief definition or description
- Plone : Add brief definition or description An open source CMS with built-in wiki capabilities.
- PmWiki : PmWiki is a PHP Wiki System which utilizes a lean core and flat-files for data storage.
- TiddlyWiki : Add brief definition or description
- Wikidot : Add brief definition or description
General encyclopedia projects
- 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.
- Hudong : Add brief definition or description
- Knowino : Add brief definition or description
- Scholarpedia : An online encyclopedia of scholarly knowledge; wiki-based but otherwise similar to a scholarly review journal.
- Wikinfo : Add brief definition or description
- Wikipedia : An online encyclopedia in every major language, open to anonymous editing by anyone.
- DKosopedia : Wiki written from a left-wing, progressive, liberal or pro-U.S. Democratic Party viewpoint; part of the Daily Kos on-line political community.
- Glottopedia : An on-line encylopedia project for linguistics, the study of language.
- Intellipedia : Wikis, of different security levels, which are used by individuals with appropriate clearances from the 16 agencies of the United States intelligence community; at least one more is accessible to trusted intelligence agencies of a small number of countries.
- MeatballWiki : Add brief definition or description
- RationalWiki : A wiki that promotes rationalism and skepticism. In addition, it mocks and parodies Conservapedia.
- Wikiquote : Wikimedia Foundation-operated wiki that attempts to produce a comprehensive archive of quotations.
- Wikitravel : A wiki-based travel information website. It is operated by Internet Brands, a for-profit company, and is not a project of the Wikimedia Foundation.
- Wikibooks : A manual and textbook project created in 2003 by the Wikimedia Foundation.
- Hawaiian language : One of the two official languages in the State of Hawaii
- Blog : A type of website, usually personal, often organized with posts in reverse chronological order.
- Content Management System : Software systems aiming at helping people to dynamically create and maintain web sites.
- Creative Commons : A 501(c)(3) non-profit organization dedicated to enabling the sharing of the digital heritage of humanity.
- EtherPad : Add brief definition or description
- Google Wave : Add brief definition or description
- Open source : A common shorthand for open source software.
- Version Control System : Add brief definition or description
- 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.