Wikipedia, a free-content online encyclopedia written and maintained by a community of volunteers known as Wikipedians, began with its first edit on 15 January 2001, two days after the domain was registered. It grew out of Nupedia, a more structured free encyclopedia, as a way to allow easier and faster drafting of articles and translations.
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 illustration, pronunciations, etymologies, inflections, usage examples, quotations, related terms, and translations of terms 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 195 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.
Wikiquote is part of a family of wiki-based projects run by the Wikimedia Foundation using MediaWiki software. The project's objective is to collaboratively produce a vast reference of quotations from prominent people, books, films, proverbs, etc. and writings about them. The website aims to be as accurate as possible regarding the provenance and sourcing of the quotations.
MediaWiki is free and open-source wiki software originally developed by Magnus Manske for use on Wikipedia on January 25, 2002, and further improved by Lee Daniel Crocker, after which development has been coordinated by the Wikimedia Foundation. It powers several wiki hosting websites across the Internet, as well as most websites hosted by the Wikimedia Foundation including Wikipedia, Wiktionary, Wikimedia Commons, Wikiquote, Meta-Wiki and Wikidata, which define a large part of the set requirements for the software. Besides its usage on Wikimedia sites, MediaWiki has been used as a knowledge management and content management system on websites such as Fandom, wikiHow and major internal installations like Intellipedia and Diplopedia.
The English Wikipedia is the primary English-language edition of Wikipedia, an online encyclopedia. It was created by Jimmy Wales and Larry Sanger on 15 January 2001, as Wikipedia's first edition.
Heinrich Magnus Manske is a German biochemist who is a leading researcher on malaria. He is a senior staff scientist at the Wellcome Sanger Institute in Cambridge, UK and a software developer of one of the first versions of the MediaWiki software, which powers Wikipedia and a number of other wiki-based websites.
The Wikimedia movement is the global community of contributors to the Wikimedia projects, including Wikipedia. This community directly builds and administers these projects with the commitment of achieving this using open standards and software.
Semantic MediaWiki (SMW) is an extension to MediaWiki that allows for annotating semantic data within wiki pages, thus turning a wiki that incorporates the extension into a semantic wiki. Data that has been encoded can be used in semantic searches, used for aggregation of pages, displayed in formats like maps, calendars and graphs, and exported to the outside world via formats like RDF and CSV.
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".
The Wikimedia Foundation, Inc., abbreviated WMF, is an American 501(c)(3) nonprofit organization headquartered in San Francisco, California, and registered there as a charitable foundation. It is the host of Wikipedia, the seventh most visited website in the world. It also hosts fourteen related open collaboration projects, and supports the development of MediaWiki, the wiki software which underpins them all. The Foundation was established in 2003 in St. Petersburg, Florida by Jimmy Wales, as a non-profit way to fund these wiki projects.
The Swedish Wikipedia is the Swedish-language edition of Wikipedia, started in 2001. A free content online encyclopedia, it is the largest reference work in Swedish history, while consistently ranked as the most visited, or one of the most visited Swedish language websites.
Wikitravel is a web-based collaborative travel guide based on the wiki format 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.
The Scots Wikipedia is the Scots-language edition of the free online encyclopedia, Wikipedia. It was established on 23 June 2005, and it first reached 1,000 articles in February 2006, and 5,000 articles in November 2010. As of December 2024, it has about 34,000 articles. The Scots Wikipedia is one of the ten Wikipedias written in an Anglic language or English-based pidgin or creole, the others being the English Wikipedia, the Simple English Wikipedia, the Old English Wikipedia, the Pitkern-Norfuk Wikipedia, the Tok Pisin Wikipedia, the Jamaican Patois Wikipedia, the Sranan Tongo Wikipedia, the Nigerian Pidgin Wikipedia, and the Ghanaian Pidgin Wikipedia.
Wikidata is a collaboratively edited multilingual knowledge graph hosted by the Wikimedia Foundation. It is a common source of open data that Wikimedia projects such as Wikipedia, and anyone else, is able to use under the CC0 public domain license. Wikidata is a wiki powered by the software MediaWiki, including its extension for semi-structured data, the Wikibase. As of mid-2024, Wikidata had 1.57 billion item statements.
translatewiki.net, formerly named Betawiki, is a web-based translation platform powered by the Translate extension for MediaWiki. It can be used to translate various kinds of texts but is commonly used for creating localisations for software interfaces.
Gender bias on Wikipedia includes various gender-related disparities on Wikipedia, particularly the overrepresentation of men among both volunteer contributors and article subjects, as well as lesser coverage of and topics primarily of interest to women.
AfroCrowd is an initiative to create and improve information about Black culture and history on Wikipedia. The New York City-based project was founded by Alice Backer in 2015.
Abstract Wikipedia is an in-development project of the Wikimedia Foundation. It aims to use Wikifunctions to create a language-independent version of Wikipedia using its structured data. First conceived in 2020, Abstract Wikipedia has been under active development ever since, with the related project of Wikifunctions launched in 2023. Nevertheless, the project has proved controversial. As envisioned, Abstract Wikipedia would consist of "Constructors", "Content", and "Renderers".
Zdenko "Denny" Vrandečić is a Croatian computer scientist. He was a co-developer of Semantic MediaWiki and Wikidata, the lead developer of the Wikifunctions project, and an employee of the Wikimedia Foundation as a Head of Special Projects, Structured Content. He published modules for the German role-playing game The Dark Eye.
