
AboutUs.com is a wiki Internet domain directory. It lists websites along with information about their content. As a wiki, AboutUs allows Internet users to add entries or modify information. AboutUs.com has since become a wiki for more than just websites. The site now allows pages to be created for people, places, and almost anything else.

Chalo Chatu translated as our world in the Zambian language is an English-language wiki-based free encyclopaedia project created by Jason Mulikita dedicated to documenting the entire Zambia only and also try to preserve the history and pride of Zambia covering historical events and current events, notable public figures, companies, organizations, websites, national monuments and other notable key features of Zambia. The site uses MediaWiki software to maintain a user-created database of information. The site's content is under a Creative Commons license(CC BY-SA 3.0) which means that it is available free to the public, but cannot be used for commercial purposes and should not be modified by people who are not part of the community of the website. Chalo Chatu is a work-in-progress, with articles in various stages of completion.

The Choral Public Domain Library (CPDL) is a sheet music archive which focuses on choral and vocal music in the public domain or otherwise freely available for printing and performing.

Citizendium is an English-language wiki-based free encyclopedia project launched by Larry Sanger, co-founder of Nupedia and Wikipedia.

Scott Joel Aaronson is an American theoretical computer scientist and David J. Bruton Jr. Centennial Professor of Computer Science at the University of Texas at Austin. His primary areas of research are quantum computing and computational complexity theory.

Conservapedia is an English-language wiki encyclopedia project written from a self-described American conservative and fundamentalist Christian point of view. The website was established in 2006 by American homeschool teacher and attorney Andrew Schlafly, son of the conservative activist Phyllis Schlafly, to counter what he perceived as a liberal bias in Wikipedia. It uses editorials and a wiki-based system for content generation.

Crnogorska Enciklopedija was an internet encyclopedia project written in Montenegrin, which existed from 2006 to 2008. It was started by the IT Association of Montenegro in 2006 as an experimental project, with the goal of providing a base for a future Montenegrin Wikipedia. As of late 2008, it is nonfunctional. It used the MediaWiki software, running at version 1.6.8, and did not carry advertising.

The Digital Classicist is a community of those interested in the application of digital humanities to the field of classics and to ancient world studies more generally. The project claims the twin aims of bringing together scholars and students with an interest in computing and the ancient world, and disseminating advice and experience to the classics discipline at large. The Digital Classicist was founded in 2005 as a collaborative project based at King's College London and the University of Kentucky, with editors and advisors from the classics discipline at large.

EcuRed is a Cuban online encyclopedia built on MediaWiki software. Launched on 13 December 2010, the site hosts over 206,000 reference articles, biographies and academic works.

Enciclopedia Libre Universal en Español is a Spanish-language wiki encyclopedia, released under the Creative Commons Attribution-ShareAlike License 3.0. It uses the MediaWiki software. It started as a fork of the Spanish Wikipedia.

Encyclopedia Dramatica is a MediaWiki software-based website, launched as EncyclopediaDramatica.com on December 10, 2004.

FringePedia is a wiki-powered online encyclopedia of information regarding the American science fiction television series Fringe. Launched on July 23, 2008 by Dennis Acevedo, the site uses MediaWiki software to maintain a user-created database of information. It is the largest, fan-generated, online encyclopedia for Fringe, and is intended to be the most comprehensive source data about the show. The site is not affiliated with Warner Bros. Entertainment, Bad Robot Productions, FB2 Films Inc., DC Comics/Wildstorm, or any other persons or organizations responsible for the production, promotion or distribution of Fringe.

Heroes Wiki was a wiki-powered reference site for NBC's science fiction drama Heroes. Launched on October 10, 2006, the site uses MediaWiki software to maintain a user-created database of information. Heroes Wiki was supported by revenue from advertising, part of which is donated to various charities. As of June 28, 2010, the site contained over 5,500 articles created and edited by approximately 9,400 registered users, with over 157 million page views.

Theodore Robert Beale, also known as Vox Day, is an American far-right activist, writer, musician, publisher, and video game designer. He has been described as a white supremacist, a misogynist, and part of the alt-right.

MediaWiki is a free and open-source wiki engine. It was developed for use on Wikipedia in 2002, and given the name "MediaWiki" in 2003. It remains in use on Wikipedia and almost all other Wikimedia websites, including Wiktionary, Wikimedia Commons and Wikidata; these sites continue to define a large part of the requirement set for MediaWiki. MediaWiki was originally developed by Magnus Manske and improved by Lee Daniel Crocker. Its development has since then been coordinated by the Wikimedia Foundation.

The International Music Score Library Project (IMSLP), also known as the Petrucci Music Library after publisher Ottaviano Petrucci, is a subscription-based project for the creation of a virtual library of public-domain music scores. Since its launch on February 16, 2006, over 495,000 scores and 59,000 recordings for over 152,000 works by over 18,000 composers have been uploaded. Based on the wiki principle, the project uses MediaWiki software, with an iOS app released July 10, 2018 and an Android app released March 28, 2019. Since June 6, 2010, the IMSLP also includes public domain and licensed recordings in its scope, to allow for study by ear.

The Internet Movie Firearms Database (IMFDb) is an online database of firearms used or featured in films, television shows, video games, and anime. A wiki running the MediaWiki software, it is similar in function to the Internet Movie Database for the entertainment industry. It includes articles relating to actors, and some characters, such as James Bond, listing the particular firearms they have been associated with in their movies. Integrated into the website is an image hosting section similar to Wikimedia Commons that includes firearm photos, manufacturer logos, screenshots and related art. The site has been cited in magazines such as the NRA's American Rifleman and True West Magazine and magazine format television shows such as Shooting USA on the Outdoor Channel.

JurisPedia is a wiki encyclopedia of academic law in many languages, currently available in Arabic, Chinese, English, French, German, Spanish and Dutch. It was started in October 2004, inspired in part by Wikipedia and the Enciclopedia Libre. JurisPedia runs on the MediaWiki software, but it is not a Wikimedia Foundation project.

The LOLCat Bible Translation Project was a wiki-based website set up in July 2007 by Martin Grondin, where editors aim to parody the entire Bible in "LOLspeak", the slang popularized by the LOLcat Internet phenomenon. The project relies on contributors to adapt passages. As of March 27, 2008, approximately 61% of the text had been adapted, and Grondin stated that he hoped the entire New Testament would be complete by the end of 2008.

Lurkmore or Lurkomorye is an informal Russian-language MediaWiki-powered online encyclopedia focusing on Internet subcultures, folklore, and memes. As of December 17, 2019, Lurkmore contains 9000 articles. It is one of the most popular humor—as well as internet-meme-related—websites of the Russian Internet.

Mahalo.com was a web directory and Internet-based knowledge exchange launched in May 2007 by Jason Calacanis. It differentiated itself from algorithmic search engines like Google and Ask.com, as well as other directory sites like DMOZ and Yahoo! by tracking and building hand-crafted result sets for many of the currently popular search terms. President Jason Rapp exited the company in September, 2012.

Marefa is a not-for-profit online encyclopedia project that uses the wiki system to provide a free Arabic encyclopedia similar to Wikipedia. It was set up by Nayel Shafei on February 16, 2007. Sister projects include Manuscript documentation, Sources, Collaborative books, forums, Blogsphere, E-mail accounts, Video/Audio library.

The Math Images Project is a wiki collaboration between Swarthmore College, the Math Forum at Drexel University, and the National Science Digital Library. The project aims to introduce the public to mathematics through beautiful and intriguing images found throughout the fields of math. The Math Images Project runs on MediaWiki software, as well as the Semantic MediaWiki extension.

Mawdoo3,, is a comprehensive online Arabic content publisher, based in Jordan, that uses the wiki system similar to Wikipedia, and provides premium quality Arabic content. Mawdoo3 was initially established in 2010 by Mohammad Jaber and Rami Al Qawasmi, and officially launched in 2012. It won the first prize for the Queen Rania National Entrepreneurship Award for the category of universities and academics in 2011. And since that time, Mawdoo3 claims to be the world's first Arabic website with more than 42 million unique visitors every month.

Metapedia is an online wiki-based encyclopedia, which contains fascist, far-right, white nationalist, white supremacist, anti-feminist, homophobic, Islamophobic, antisemitic, Holocaust-denying, and neo-Nazi points of view. The site describes itself as being an alternative to Wikipedia that focuses on European culture, art, science, philosophy, and politics. It was founded in 2006, initially in a Swedish-language version, by Swedish neo-Nazi publisher Anders Lagerström, who currently heads the project together with Lennart Berg.

Metavid is a free-software wiki-based community archive project for audio video media. The site hosts public domain US legislative footage. It was started as a Digital Arts/New Media MFA thesis project of Michael Dale and Abram Stern under the advisement of Professor Warren Sack in late 2005 at the University of California, Santa Cruz. Its continued development is supported by a grant from the Sunlight Foundation. It works by using a "simple Linux box to record everything that C-SPAN shoots", which can then be used to provide "brief searchable clips using closed-captioning text".

NeuroLex is a dynamic lexicon of neuroscience concepts. It is a structured as a semantic wiki, using Semantic MediaWiki. NeuroLex is supported by the Neuroscience Information Framework project.

Open Energy Information (OpenEI) is a website for policy makers, researchers, technology investors, venture capitalists, and market professionals with energy data, information, analyses, tools, images, maps, and other resources. It was established by the United States Department of Energy on 9 December 2009.

OpenWetWare is a wiki whose mission is "to support open research, education, publication, and discussion in biological sciences and engineering."

The PCGamingWiki is a collaboratively edited, free Internet encyclopedia focused on collecting game behavior data to optimizing gameplay and fixing issues found in PC video games. Intended fixes and optimizations range from simple cutscene removals to modifications that allow for wide-screen resolutions and more. The wiki runs on MediaWiki software and was created by Andrew Tsai. The site was founded on February 9, 2012. As of April 2019, the PCGamingWiki has more than 20,000 registered users and 35,000 content pages. Since its inception, the PCGamingWiki has been featured on numerous gaming focused websites including Kotaku, Destructoid, and Rock Paper Shotgun. It regularly receives more than 10,000 unique page views a day.

Project Gutenberg (PG) is a volunteer effort to digitize and archive cultural works, as well as to "encourage the creation and distribution of eBooks." It was founded in 1971 by American writer Michael S. Hart and is the oldest digital library. Most of the items in its collection are the full texts of books in the public domain. The Project tries to make these as free as possible, in long-lasting, open formats that can be used on almost any computer. As of 20 May 2020, Project Gutenberg had reached 62,108 items in its collection of free eBooks.

Proteopedia is a wiki, 3D encyclopedia of proteins and other molecules. The site contains a page for every entry in the Protein Data Bank, as well as pages that are more descriptive of protein structures in general such as acetylcholinesterase, hemoglobin, and the photosystem II with a Jmol view that highlights functional sites and ligands. It employs a scene-authoring tool so that users do not have to learn JSmol script language to create customized molecular scenes. Custom scenes are easily attached to "green links" in descriptive text that display those scenes in JSmol. A web browser is all that is needed to access the site and the 3D information; no viewers are required to be installed.

RationalWiki is a wiki whose stated goals are to "analyze and refute pseudoscience and the anti-science movement, document 'crank' ideas, explore conspiracy theories, authoritarianism, and fundamentalism, and analyze how these subjects are handled in the media." It was created in 2007 as a counterpoint to Conservapedia after an incident in which contributors attempting to edit Conservapedia were banned.

Rock in China is a website dedicated to the documenting and archiving of contemporary Chinese music, ranging from rock music to punk, metal, electro, jazz and hiphop. It was founded in 2004, and in 2006 became a wiki. The website currently runs on MediaWiki and Semantic MediaWiki.

Rodovid is a free online collaborative family tree portal. Originally a Ukrainian project, as of 2012 it had active communities in 25 languages. It provides a web service built using MediaWiki and its own Rodovid Engine software to help store and visualize family relationships.

saveMLAK is a wiki designed to coordinate responses to the 2011 Tōhoku earthquake and tsunami, focusing on protecting museums, libraries, archives and kominkans, or community centers. It was started in March 2011, a day after the earthquake and tsunami hit. Makoto Okamoto is the site's founder and main administrator. The wiki runs on the MediaWiki software, along with the extension Semantic MediaWiki.

Scholarpedia is an English-language online wiki-based encyclopedia with features commonly associated with open-access online academic journals, which aims to have quality content.

Stupidedia is a German-language wiki featuring satirically themed and humorous articles. Stupidedia is the largest German-language wiki of this kind, with over 22,412 articles as of March 2014. It uses MediaWiki software, like many other wikis. Some articles of celebrities which are considered overly offensive, such as their article on Heino or Bushido, have been blocked. The site was launched in 2004, a year prior to its English counterpart, Uncyclopedia, which has since surpassed the website in popularity due to its closure to new users since 31 January 2018.
Supernatural Wiki, also known as SuperWiki is a wiki-powered online encyclopedia for the CW's horror television series Supernatural, associated projects and events.

TermWiki.com is a major social learning network that allows users to learn, discover, share, and store personal terms and glossaries in 1487 domains in 97 languages. The site emphasizes collaboration, with a forum, a question/answer module, messaging features that encourage user interaction, and discussion pages on each term. The personal profile page allows users to become fans of other users, add photos, and add links and post comments on other users recent activity. TermWiki also allows companies to conduct international ad campaigns on keyword terms, for improved SEO performance.

The Cutting Room Floor (TCRF) is a website dedicated to the cataloguing of unused content and leftover debugging material in video games. The site and its discoveries have been referenced in the gaming press.

The UK LGBT Archive, formerly the LGBT History Project, is an LGBT online encyclopaedia for the United Kingdom It was created in June 2011 by Jonathan Harbourne using MediaWiki software. Content is published under the Creative Commons Attribution-ShareAlike licence. By December 2015 the site had "over 3600 articles... Each article explains the history of a character, event or important document and explains its special place in queer history."

Veropedia was a free, advertising-supported Internet encyclopedia project launched in late October 2007. It was taken down in January 2009, pending creation of a new version.

Vinismo.com was a website with the goal of having a free, complete, up-to-date, and reliable guide of all wine regions and producers in the world. It was founded in April, 2007 by Evan Prodromou and launched on July 24, 2007. It used the MediaWiki software platform for management of its content. As of February 2011, Vinismo was no longer working, even though in May 2010 it had 35,000 articles contributed by over 600 authors.

WeRelate.org is a wiki genealogy website, that provides genealogy tools and data. It bills itself as the world's largest freely licensed genealogy wiki, with almost 5 million wiki pages. Its information is free, and the site is non-commercial and nonsectarian. WeRelate had over 2.5 million person pages, over 930,000 family pages and 44,000 images in January 2014.

Whole Wheat Radio was a not-for-profit, listener-driven online community radio station from Talkeetna, Alaska. It was centered around independent music, and aired 24 hours a day.

WikiBaseball is a Taiwanese baseball website. It was created on April 14, 2005. Its major contents are people, event, time, place, and merchandise of Taiwanese baseball.

WikiEducator is an international online community project for the collaborative development of learning materials, which educators are free to reuse, adapt and share without restriction. WikiEducator was launched in 2006 and is supported by the non-profit Open Education Resource Foundation (OER). A variety of learning resources are available on WikiEducator: direct instructional resources such as lesson plans and full courses, as well as learning-support resources, such as individual school portals and funding proposals.

Wikihow is an online wiki-style community consisting of an extensive database of how-to guides. Founded in 2005 by Internet entrepreneur Jack Herrick, wikiHow is a hybrid organization, a for-profit company run for a social mission. wikiHow software is open source and its text content is released under a Creative Commons (BY-NC-SA) license. wikiHow states that it was inspired by Wikipedia, but it is not related to Wikimedia/Wikipedia in any way. Both organizations use the free and open-source MediaWiki software.

WikiLeaks is an international non-profit organisation that publishes news leaks and classified media provided by anonymous sources. Its website, initiated in 2006 in Iceland by the organisation Sunshine Press, claimed in 2015 to have released online 10 million documents in its first 10 years. Julian Assange, an Australian Internet activist, is generally described as its founder and director. Since September 2018, Kristinn Hrafnsson has served as its editor-in-chief. WikiLeaks is not affiliated with Wikipedia or the Wikimedia Foundation.

Wikimedia Commons is an online repository of free-use images, sounds, other media, and JSON files. It is a project of the Wikimedia Foundation.

WikiPilipinas was an online, free content website which bills itself as a combination "non-academic encyclopedia", web portal, directory and almanac for Philippine-based knowledge. Like Wikipedia, it contains various articles on Philippine-related topics. Unlike Wikipedia, many of the articles cover topics that would otherwise be deemed unencyclopedic by the stricter Wikipedia. The service for example, promotes the concept of original research and eschews the larger encyclopedia's neutral point-of-view principle.

Wikitravel is a web-based collaborative travel guide based on the wiki model and owned by Internet Brands. It was most active from 2003 through 2012, when most of its editing community left and brought their contributions to the nonprofit Wikivoyage guide.

WikiVet is a wiki of veterinary content based on the MediaWiki platform. The website is a collaborative initiative between various veterinary schools, and its content covers the entire veterinary curriculum. WikiVet is part of the WikiVet Educational Foundation.

Wikivoyage is a free web-based travel guide for travel destinations and travel topics written by volunteer authors. It is a sister project of Wikipedia and supported and hosted by the same non-profit Wikimedia Foundation (WMF). Wikivoyage has been called the "Wikipedia of travel guides".

Wiktionary is a multilingual, web-based project to create a free content dictionary of terms in all natural languages and in a number of artificial languages. These entries may contain definitions, images for illustrations, pronunciations, etymologies, inflections, usage examples, quotations, related terms, and translations of words into other languages, among other features. It is collaboratively edited via a wiki. Its name is a portmanteau of the words wiki and dictionary. It is available in 171 languages and in Simple English. Like its sister project Wikipedia, Wiktionary is run by the Wikimedia Foundation, and is written collaboratively by volunteers, dubbed "Wiktionarians". Its wiki software, MediaWiki, allows almost anyone with access to the website to create and edit entries.

Wowpedia is a wiki about the Warcraft fictional universe. It covers all of the Warcraft games, including the MMORPG World of Warcraft. It is both a specialized wiki built around the Warcraft universe and a collaborative space for players to develop and publish strategies for Warcraft games. It was officially announced on 25 October 2010.

Yellowikis was a MediaWiki website collecting basic information about businesses. This information included basic contact details such as company name, address, websites, and telephone numbers, as well as internal Yellowiki wikilinks to competitors. Yellowikis was launched in January 2005. As of March 2011, the main page of Yellowikis had been translated into more than twenty five different languages.