
A wiki is a hypertext publication collaboratively edited and managed by its own audience directly using a web browser. A typical wiki contains multiple pages for the subjects or scope of the project and could be either open to the public or limited to use within an organization for maintaining its internal knowledge base.

The history of wikis begins in 1994, when Ward Cunningham gave the name "WikiWikiWeb" to the knowledge base, which ran on his company's website at c2.com, and the wiki software that powered it. The "wiki went public" in March 1995—the date used in anniversary celebrations of the wiki's origins. c2.com is thus the first true wiki, or a website with pages and links that can be easily edited via the browser, with a reliable version history for each page. He chose "WikiWikiWeb" as the name based on his memories of the "Wiki Wiki Shuttle" at Honolulu International Airport, and because "wiki" is the Hawaiian word for "quick".

The Biographicon was a wiki-based website containing biographies of famous and non-famous people, that existed from March to August 2008. The site also showed connections between individuals covered, and explained the circumstances under which they met.

Pokémon is a Japanese media franchise managed by The Pokémon Company, a company founded by Nintendo, Game Freak, and Creatures. The franchise was created by Satoshi Tajiri in 1996, and is centered on fictional creatures called "Pokémon". In Pokémon, humans, known as Pokémon Trainers, catch and train Pokémon to battle other Pokémon for sport. All media works within the franchise are set in the Pokémon universe. The English slogan for the franchise is "Gotta Catch ‘Em All!". There are currently 901 Pokémon species.

Chalo Chatu translated as our world in the Zambian language is an English-language wiki-based free encyclopaedia project created by Jason Mulikita that is dedicated to documenting the Zambia 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.

Conservapedia is an English-language wiki-based online 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.

daviswiki.org is a wiki based in Davis, California about the people, events, universities, bands, places and other things of the city. For example, it includes information about local events, advice for classes to take or not take at UC Davis, locations of the cleanest bathrooms in town, and ways a poor student can best pack a to-go box from the local restaurant buffets. Newcomers or anyone with a question about life in Davis are often asked by "wikivangelists", "Did you check the wiki?", much in the spirit of RTFM. It was launched in June 2004.

The Families In British India Society (FIBIS) is a genealogical organisation which assists people in researching their family history and the background against which their ancestors led their lives in British India.

The Family History Research Wiki provides handbook reference information, and educational articles to help genealogists find and interpret records of their ancestors. It is a free-access, free-content, online encyclopedia on a wiki, hosted as part of the FamilySearch site. It is sponsored by FamilySearch, a non-profit organization, and a genealogical arm of The Church of Jesus Christ of Latter-day Saints. Anyone with access to the Internet may read any of the over 91,000 articles, and almost all articles can be edited by registered users (contributors). Registration is free.

Geo-Wiki is a platform for engaging citizens and experts in both environmental and socioeconomic monitoring, established in 2009 at the International Institute for Applied Systems Analysis (IIASA). It aids in both, the validation of existing geographical information and the collection of new geographical information through crowdsourcing and citizen science. Using data sources such as satellite imagery, geotagged photographs and the Internet, individual volunteers are able to contribute valuable in-situ data, either by validating existing data and comparing it with satellite imagery, or by collecting new information. Other methods for crowd-sourced data collection in Geo-Wiki include campaigns and games, used as incentives to motivate citizens. Collected data in the platform is freely available.

Giant Bomb is an American video game website and wiki that includes personality-driven gaming videos, commentary, news and reviews, created by former GameSpot editors Jeff Gerstmann and Ryan Davis. The website was voted by Time magazine as one of the Top 50 websites of 2011. Originally part of Whiskey Media, the website was acquired by CBS Interactive in March 2012 before being sold to Red Ventures in 2020.

Google Wave, later known as Apache Wave, was a software framework for real-time collaborative editing online. Originally developed by Google and announced on 28 May 2009, it was renamed to Apache Wave when the project was adopted by the Apache Software Foundation as an incubator project in 2010.

Hackteria is a web platform and collection of open source biological art projects instigated in February 2009 by Andy Gracie, Marc Dusseiller and Yashas Shetty, after collaboration during the Interactivos?09 Garage Science at Medialab Prado in Madrid. According to their website the aim of the project is to develop a rich wiki-based web resource for people interested in or developing projects that involve bioart, open source software/open source hardware, DIY biology, art/science collaborations and electronic experimentation.

The Hidden Wiki was a dark web MediaWiki wiki operating as Tor hidden services that could be anonymously edited after registering on the site. The main page served as a directory of links to other .onion sites.

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.

Lingua Libre is an online collaborative project and tool by the Wikimedia France association, which aims to build a collaborative, multilingual, audiovisual corpus under free license.

Namuwiki is a Paraguay-based Korean wiki created on April 17, 2015, powered by the proprietary wiki software The Seed. Its name, "Namu" (나무) translates literally to "tree" in Korean. According to its slogan and self-description, Namuwiki strives to share community-driven knowledge and information, whilst respecting the freedom and equal rights of every user.

OpenSym is a shorthand for International Symposium on Open Collaboration, formerly International Symposium on Wikis and Open Collaboration, also formerly WikiSym or the Wiki Symposium, a conference dedicated to wiki research and practice. In 2014, the name of the conference was changed from WikiSym to OpenSym to reflect a broadening of scope from wiki and Wikipedia research and practice to open collaboration research, including wikis and Wikipedia research, but also free/libre/open source, open data, etc. research. The conference series is held in-cooperation with ACM SIGWEB and ACM SIGSOFT and its proceedings are published in the ACM Digital Library.

Phabricator is a suite of web-based software development collaboration tools, including the Differential code review tool, the Diffusion repository browser, the Herald change monitoring tool, the Maniphest bug tracker, and the Phriction wiki. Phabricator integrates with Git, Mercurial, and Subversion. It is available as free software under the Apache License 2.0.

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.

Reddit is an American social news aggregation, web content rating, and discussion website. Registered members submit content to the site such as links, text posts, images, and videos, which are then voted up or down by other members. Posts are organized by subject into user-created boards called "communities" or "subreddits", which cover a variety of topics such as news, politics, religion, science, movies, video games, music, books, sports, fitness, cooking, pets, and image-sharing. Submissions with more upvotes appear towards the top of their subreddit and, if they receive enough upvotes, ultimately on the site's front page. Although there are strict rules prohibiting harassment, it still occurs, and Reddit administrators moderate the communities and close or restrict them on occasion. Moderation is also conducted by community-specific moderators, who are not considered Reddit employees.

Top Level Design is a company based in Portland, Oregon, in the United States, and the domain name registry for the generic top-level domains .wiki, .ink, .design, and .gay. Ray King serves as its chief executive officer.

Uncyclopedia is an online encyclopedia that parodies Wikipedia. Its logo, a hollow "puzzle potato", parodies Wikipedia's globe puzzle logo, and it styles itself "the content-free encyclopedia", parodying Wikipedia's slogan of "the free encyclopedia." Founded in 2005 as an English-language wiki, the project spans over 75 languages as well as several subprojects parodying other wikis. The English version has approximately 36,000 pages of content, second only to the Portuguese, and its name is a portmanteau of the prefix "un-" and the word "encyclopedia".

The Universal Edit Button is a browser extension that provides a green pencil icon in the address bar of a web browser that indicates that a web page on the World Wide Web is editable. It is similar to the orange "broadcast" RSS icon that indicates that there is a web feed available. Clicking the icon opens the edit window. It was invented by a collaborative team of wiki enthusiasts, including Ward Cunningham, Jack Herrick, and many others.

The Visual Novel Database is an online database, wiki and Internet forum for visual novels. As of 2019, the vndb had catalogued a total of 24,000 visual novels, and its forum had reached 14,300 users. According to Electronic Gaming Monthly, the vndb was responsible for helping bring visual novels to an international audience.

The Wiki Way: Quick Collaboration on the Web is a 2001 book about wikis by Bo Leuf and Ward Cunningham. It was the first major book published about using wikis. Cunningham invented wikis when he wrote WikiWikiWeb, the first wiki website software.

A 3D printed firearm is a firearm that is primarily produced with a 3D printer. They can be classified by the type of 3D printers used: plastic, metal, or both. While plastic ones are usually used as improvised firearms that evade gun control, 3D-printed metal guns are more commonly thought as a way for legitimate gun manufacturers to exceed traditional design limitations.

WikiArt is an online, user-editable visual art encyclopedia. Based upon a statement in its 2013 financial report, the site appears to have been online since 2010.

Wikiloc is a website, launched in 2006, that offers for free GPS trails and waypoints that members can upload and share. This mashup shows the routes in frames showing Google Maps. The service is also available in Google Earth. There are mobile apps for Android and iPhone. The product has more than 4.5M members, is offered in many languages and has more than 11.6M tracks of dozens of activities in many countries and territories. Wikiloc began as a worldwide online reference for hiking. Additionally, photographs on Wikiloc enabled automated content analysis to characterize the landscape in the Ebro Delta Natural Park, Spain.

Wikirating is a free, collaborative platform for credit ratings that aims to provide a transparent source for credit ratings of countries, companies and structured products. It is the first independent rating platform mainly based on community's contributions to feed data and information to establish independent, impartial and transparent ratings.

WikiStage is a video platform and a network of event organisers managed by the non-profit WikiStage Association. It aims to create a collaborative video platform for debate. Conferences around the world use the WikiStage platform to share their speaker’s videos. To connect talks with those of other speakers, the videos are grouped into a debate according to their topic. The debate wall allows users to watch and vote for short videos from different sources on the topic in question.

WikiTribune was a news wiki where volunteers wrote and curated articles about widely publicised news by proof-reading, fact-checking, suggesting possible changes, and adding sources from other, usually long established outlets. Jimmy Wales, co-founder of Wikipedia, announced the site in April 2017 as a for-profit site, not affiliated with Wikipedia or its support organisation, the Wikimedia Foundation. Until October 2018, WikiTribune employed journalists with established backgrounds in the profession who researched, syndicated, and reported news.