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.
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.
Wikisource is an online wiki-based digital library of free-content textual sources operated by the Wikimedia Foundation. Wikisource is the name of the project as a whole; it is also the name for each instance of that project, one for each language. The project's aim is to host all forms of free text, in many languages, and translations. Originally conceived as an archive to store useful or important historical texts, it has expanded to become a general-content library. The project officially began on November 24, 2003, under the name Project Sourceberg, a play on Project Gutenberg. The name Wikisource was adopted later that year and it received its own domain name.
The French Wikipedia is the French-language edition of Wikipedia, the free online encyclopedia. This edition was started on 23 March 2001, two months after the official creation of Wikipedia. It has 2,657,955 articles as of 10 January 2025, making it the fourth-largest Wikipedia language version, after the English-, Cebuano-, and German-language editions, and the largest Wikipedia edition in a Romance language. It has the third-most edits, and ranks 6th in terms of depth among Wikipedia editions, in addition to being the third-largest Wikipedia edition by number of active users as of January 2025. It was the third edition, after the English Wikipedia and German Wikipedia, to exceed 1 million articles: this occurred on 23 September 2010. In April 2016, the project had 4,657 active editors who made at least five edits in that month.
The Portuguese Wikipedia is the Portuguese-language edition of Wikipedia, the free encyclopedia. It was started on 11 May 2001.
The Romanian Wikipedia is the Romanian language edition of Wikipedia, the free encyclopedia. Started on 12 July 2003, as of 10 January 2025 this edition has 502,386 articles and is the 30th largest Wikipedia edition. In December 2004, users on the Romanian Wikipedia started to talk about founding a local chapter of Wikimedia, Asociația Wikimedia România.
There are two Norwegian language editions of Wikipedia: one for articles written in Bokmål or Riksmål, and one for articles written in Nynorsk or Høgnorsk. There are currently 640,997 articles on the Norwegian Wikipedia edition in Bokmål/Riksmål, and 173,031 articles on the Nynorsk edition.
The Catalan Wikipedia is the Catalan-language edition of the Wikipedia free online encyclopedia. It was created on 16 March 2001, just a few minutes after the first non-English Wikipedia, the German edition. With more than 767,000 articles, it is currently the 20th-largest Wikipedia as measured by the number of articles, and the fifth-largest Wikipedia in a Romance language. In April 2016, the project had 582 active editors who made at least five edits in that month.
The Cantonese Wikipedia is the Cantonese-language edition of Wikipedia, run by the Wikimedia Foundation. It was started on 25 March 2006.
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.
The Japanese Wikipedia is the Japanese edition of Wikipedia, a free, open-source online encyclopedia. Started on 11 May 2001, the edition attained the 200,000 article mark in April 2006 and the 500,000 article mark in June 2008. As of January 2025, it has almost 1,444,000 articles with 12,816 active contributors, ranking fourth in the latter metric behind the English, French and German editions.
The Silesian Wikipedia is the Silesian edition of Wikipedia. It was started on 26 May 2008.
The Alemannic Wikipedia is the Alemannic language edition of the Web-based free-content encyclopedia Wikipedia. The project was started on 13 November 2003, as an Alsatian language edition. A year later it was expanded to encompass all Alemannic dialects because of low activity in the first year. Since 2004 all Alemannic dialects are accepted on als:wp.
The Wikipedia of Ripuarian languages is the Ripuarian edition of Wikipedia. It was started on 6 July 2005, as WiKoelsch on a private server, and was converted to an official Wikipedia during April 2006. As only about a million people speak the Ripuarian languages, the Ripuarian Wikipedia is relatively small. Since both the use of Ripuarian, and the population capable of using a Ripuarian language, are decreasing, it is also an endangered language Wikipedia. The total number of edits on this Wikipedia is 1,609,092.
The Southern Min Wikipedia, also known as Min Nan Wikipedia and Holopedia is the Southern Min edition of Wikipedia, the free encyclopedia. It is the second largest Wikipedia in a Sinitic language, after Mandarin. Written in Pe̍h-ōe-jī, it mainly uses the Taiwanese Hokkien dialect. As of 28 December 2024, it has 432,928 articles.
The Volapük Wikipedia is the Volapük-language edition of the free online encyclopedia Wikipedia. It was created in February 2003, but launched in January 2004. As of 11 January 2025, it is the 110th-largest Wikipedia as measured by the number of articles, with about 40,000 articles, and the third-largest Wikipedia in a constructed language after the Esperanto Wikipedia and the Ido Wikipedia.
The Classical Syriac Wikipedia, also known as the Aramaic Wikipedia, is an edition of Wikipedia in Classical Syriac. It was officially created in July 2004, but it wasn't until 2005 when its second article was published.
Balinese Wikipedia is the edition of Wikipedia in the Balinese language. The Balinese Wikipedia generally follows the basic rules of Indonesian Wikipedia. The Balinese Wikipedia was in the project incubator Wikimedia, since the incubator page was created in 2005 until October 2019.
Wikifunctions is a collaboratively edited catalog of computer functions to enable the creation, modification, and reuse of source code. It is closely related to Abstract Wikipedia, an extension of Wikidata to create a language-independent version of Wikipedia using its structured data. Provisionally named Wikilambda, the definitive name of Wikifunctions was announced on 22 December 2020 following a naming contest. Wikifunctions is the first Wikimedia project to launch since Wikidata in 2012. After three years of development, Wikifunctions officially launched in July 2023.
