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.
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.
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 2,658,562 articles as of 13 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.
One Laptop per Child (OLPC) was a non-profit initiative that operated from 2005 to 2014 with the goal of transforming education for children around the world by creating and distributing educational devices for the developing world, and by creating software and content for those devices.
wikiHow is an online wiki-style publication featuring expert-verified informational articles and quizzes on a variety of topics. Founded in 2005 by Internet entrepreneur Jack Herrick, its aim is to create an extensive database of instructional content, originally relying on the wiki model of open collaboration to allow users to add, create, and modify content. In response to changes in the search ecosystem, wikiHow's content model shifted to incorporate more in-house research, staff editors, and a network of over 1,000 experts. It is a hybrid organization, a for-profit company run for a social mission. wikiHow uses a forked version of the free and open-source MediaWiki software; these modifications made by wikiHow were freely available to the general public via a self-serve download site from 2010 to late 2020, when wikiHow chose to discontinue the self-serve portal, citing vague "DoS attacks", as well as noting that publishing the source code is "not part of our core mission". The site's article text content that's not provided by wikiHow staff is released under a Creative Commons NonCommercial license.
The Urdu Wikipedia, started in January 2004, is the Standard Urdu-language edition of Wikipedia, a free, open-content encyclopedia. As of 10 January 2025, it has 216,423 articles, 189,118 registered users and 7,461 files, and it is the 54th largest edition of Wikipedia by article count, and ranks 20th in terms of depth among Wikipedias with over 150,000 articles. There were 6 million page views in January 2024. On 7 January 2024, the Urdu Wikipedia became the first South Asian-language Wikipedia to surpass 200,000 articles.
The Estonian Wikipedia is the Estonian version of Wikipedia, the free encyclopedia, started on 24 August 2002. As of January 2025, the edition has about 250,000 articles.
Sugar is a free and open-source desktop environment designed for interactive learning by children. It was developed by SugarLabs. Developed as part of the One Laptop per Child (OLPC) project, Sugar was the default interface on OLPC XO-1 laptop computers. The OLPC XO-1.5 and later provided the option of either the Gnome or Sugar interfaces.
The Latvian Wikipedia is the Latvian-language edition of the free online encyclopedia Wikipedia. It was created on 6 June 2003. With more than 132,000 articles, it is currently the 68th-largest Wikipedia as measured by the number of articles and the second-largest Wikipedia in a Baltic language after the Lithuanian Wikipedia.
The Ceibal is a Uruguayan initiative to implement the "One laptop per child" model to introduce Information and Communication Technologies (ICT) in primary education and secondary schools.
The OLPC XO is a low cost laptop computer intended to be distributed to children in developing countries around the world, to provide them with access to knowledge, and opportunities to "explore, experiment and express themselves". The XO was developed by Nicholas Negroponte, a co-founder of MIT's Media Lab, and designed by Yves Behar's Fuseproject company. The laptop is manufactured by Quanta Computer and developed by One Laptop per Child (OLPC), a non-profit 501(c)(3) organization.
The Egyptian Arabic Wikipedia is the Egyptian Arabic version of Wikipedia, a free, open-content encyclopedia. This Wikipedia primarily acts as an alternative to the Arabic Wikipedia in favor of speakers of the Egyptian dialect. Until 2020, it was the only Wikipedia written in a localised dialect of Arabic. The second one is Moroccan Wikipedia, which was approved and created in July 2020.
The Spanish Wikipedia is the Spanish-language edition of Wikipedia, a free online encyclopedia. It has 2,002,770 articles. Started in May 2001, it reached 100,000 articles on 8 March 2006, and 1,000,000 articles on 16 May 2013. It is the 8th-largest Wikipedia as measured by the number of articles and has the 4th-most edits. It also ranks 28th in terms of article depth among Wikipedias.
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.
Wikiversity is a Wikimedia Foundation project that supports learning communities, their learning materials, and resulting activities. It differs from Wikipedia in that it offers tutorials and other materials for the fostering of learning, rather than an encyclopedia. It is available in many languages.
The following outline is provided as an overview of and a topical guide to Wikipedia:
Fluenz is a digital language learning platform developed by Fluenz Inc., a U.S. entrepreneurial company. The interactive content can be downloadable or accessed online on computers and mobile devices. The product range consists of programs to learn Spanish as spoken in Latin America, Spanish as spoken in Spain, French, Italian, Mandarin, German, and Portuguese.
