Online encyclopedias

Wikipedia is a free online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki software MediaWiki. Founded by Jimmy Wales and Larry Sanger in 2001, Wikipedia has been hosted since 2003 by the Wikimedia Foundation, an American nonprofit organization funded mainly by donations from readers. Wikipedia is the largest and most-read reference work in history. According to Jimmy Wales, its mission is to make the sum of all human knowledge available to every person in the world.

Wikimedia list article

Grokipedia is an AI-generated online encyclopedia operated by the American company xAI. The site was launched on October 27, 2025. Some entries are generated by Grok, a large language model owned by the same company, while others were forked from Wikipedia, with some altered and some used nearly verbatim. Articles cannot be directly edited, though logged-in visitors to the encyclopedia can suggest corrections via a pop-up form, which are reviewed by Grok.

collaborative project intended to create an encyclopedia documenting all living species known to science

encyclopedia accessible via the World Wide Web

Knol was a Google project that aimed to include user-written articles on a range of topics. The lower-case term knol, which Google defined as a "unit of knowledge", referred to an article in the project. Knol was often viewed as a rival to Wikipedia.

Microsoft Encarta was a digital multimedia encyclopedia and search engine published by Microsoft from 1993 to 2009. Originally sold on CD-ROM or DVD, it was also available online via annual subscription, although later articles could also be viewed for free online with advertisements. By 2008, the complete English version, Encarta Premium, consisted of more than 62,000 articles, numerous photos and illustrations, music clips, videos, interactive content, timelines, maps, atlases and homework tools.

EcuRed is a Cuban online encyclopedia built on MediaWiki software. The site was launched on 13 December 2010. The name is an acronym from the Spanish phrase '''' (literally "Cuban Encyclopedia on the Network").

RationalWiki is an online wiki which is written from a scientific skeptic, secular, and progressive perspective. Its 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, an American conservative and Christian fundamentalist website, after an incident in which some editors of Conservapedia were banned. RationalWiki has been described as liberal in contrast to C

PlanetMath is a free, collaborative, mathematics online encyclopedia. Intended to be comprehensive, the project is currently hosted by the University of Waterloo. The site is owned by a US-based nonprofit corporation, "PlanetMath.org, Ltd".

online wiki listing and analyzing conventions (tropes) found in fictional works

Everipedia (), renamed IQ.wiki in 2022, is a blockchain-based online encyclopedia, originally designed as a general purpose reference but has pivoted to focus on the cryptocurrency space. Everipedia was founded in 2014 and was officially launched in 2015, as a fork of Wikipedia. Larry Sanger (who co-founded Wikipedia) joined the company in 2017, and resigned in 2019.

English language reference work

Wikimedia list article

online encyclopedia

Emojipedia is an emoji reference website which documents the meaning and common usage of emoji characters in the Unicode Standard. Most commonly described as an emoji encyclopedia or emoji dictionary, Emojipedia also publishes articles and provides tools for tracking new emoji characters, design changes and usage trends. It has been owned by Zedge since 2021.

online encyclopedia

is a Japanese-language online encyclopedia which allows users to search across dictionaries, encyclopedias, and databases provided by publishers and others. It is operated by Voyage Marketing Co. At launch, the service's name was in rōmaji, but has since been stylized in katakana.

online edition of the Polish-language encyclopedia PWN

free online encyclopedia about Zambia

MicroWiki is a free online encyclopedia about micronations launched in 2005. It has since become the principal way in which Internet users document micronational matters, as most do not meet Wikipedia's notability requirements. It is maintained by volunteers using the same MediaWiki software as Wikipedia. MicroWiki describes itself as "the largest encyclopedia about micronations".

Marefa (in ) 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 (with unlimited storage), Video/Audio library.

electronic reference about the Earth

free online dictionary and encyclopedia.

internet encyclopedia of folklore, mythology, and religion

book by Thomas Kelly Cheyne

JurisPedia () was a wiki-based online encyclopedia of academic law in many languages, at one time 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 (University of Seville). JurisPedia ran on the MediaWiki software, but it was not a Wikimedia Foundation project.

Moegirlpedia, commonly shortened as Mengbai, is a Chinese wiki encyclopedia launched in October 11, 2010, and features anime, comics, and video games, commonly abbreviated in China as ACG, and mainly contains female characters, moe anthropomorphism works, and Chinese authors' original works.

Encyclopaedistics or encyclopaedics as a discipline, is the academic scholarship of encyclopedias as sources of encyclopedic knowledge and cultural objects as well; in this sense, this discipline is also known as "encyclopaedia studies" and can be termed as "theoretical encyclopaediography" by analogy with theoretical lexicography. Encyclopaedistics as a practical activity (profession or business) also called "encyclopaedic practice" or "encyclopedism" is the process of assembling encyclopaedias available to the public for sale or for free (encyclopaedia publishing or practical encyclopediogra

Turkpidya is the first online encyclopedia about Turkey and Turkic countries, founded in June 2020 by Abdullah Habib. The platform offers information on a range of topics related to Turkey, including its culture, history, and economy.

universal Latvian-language printed and digital encyclopedia

encyclopedia (2005-)

The PCGamingWiki is a British-based collaboratively edited wiki internet encyclopaedia focused on collecting video game behaviour data (such as save locations and startup parameters), to optimising gameplay, and fixing issues found in PC games. Intended fixes and optimisations range from simple cutscene removals, to modifications that allow for wide-screen resolutions, and more. The wiki site runs on MediaWiki software, and was created by Andrew Tsai, a British businessman from London, England. The site was founded on . As of October 2022, the PCGamingWiki has more than 30,000 registered users

the first online encyclopedia in Esperanto