This article contains a list of notable wikis, which are websites that use wiki software, allowing users to collaboratively edit content and view old versions of the content. These websites use several different wiki software packages.
| Name | Focus | Notes | Entries | License |
|---|---|---|---|---|
| AboutUs | Web directory | Initially pre-populated with information about many different websites. Uses MediaWiki software, but now largely with Ruby on Rails | 28,739,286[1] | GFDL and CC BY-SA 3.0 |
| Appropedia | Poverty reduction, international development | 15,437[2] | CC BY-SA 4.0 | |
| Astro-Databank | Encyclopedic | Astrological wiki project, with birth details for notable people of the world. | 37,614[3] | |
| Baidu Baike | Encyclopedic / Simplified Chinese | Simplified Chinese encyclopedia | 27,482,961[4] | |
| Baike.com | Encyclopedic / Simplified Chinese | Simplified Chinese encyclopedia | 15,180,000[citation needed] | |
| Brilliant | Math/Science | Written at the reading and comprehension level of an advanced high school student. Wiki pages are reviewed before they are put up.[5] | ||
| Base de datos | Encyclopedic/Spanish | Spanish language encyclopedia, with own wiki software. | 13,518[6] | Copyrighted/Other |
| Catawiki | Catalogues | Originally in Dutch, with English version. Collectors specific for comics, coins, stamps, trading cards, board games, model cars, model trains, bank notes, books, watches, Disney memorabilia, clocks and other. | 200,000 | |
| Citizendium | Encyclopedic | Requires writers to use real names rather than usernames; guided by expert input while allowing edits from the general public | 17,258[7] | CC BY-SA 3.0 |
| Conservapedia | Encyclopedic | Information and articles are written from a conservative Christian viewpoint aimed at correcting the alleged liberal bias of Wikipedia. | 51,493[8] | Copyrighted (free use) |
| Copyright Evidence | Copyright studies | Exists to inform public debate and policy development on copyright related issues based on categorising empirical studies. Funded and maintained by CREATe at the University of Glasgow. | 2,980[9] | |
| Choral Public Domain Library (CPDL) | Music | Wiki library of free typeset musical scores | 40,888[10] | Public domain, CPDL Licence, C.C. Licences, Copyrighted (free use) |
| DavisWiki | Place – Davis, California | City wiki dedicated solely to Davis; at one point the largest city wiki | 15,593[11] | CC BY 3.0 |
| Diplopedia | Government – Diplomacy | Encyclopedia of the U.S. Department of State collecting items related to international relations and diplomacy | ||
| EcuRed | Cuban perspective on global issues, in Spanish | Run by Cuba's Youth Computer Club, an affiliate of the Communist Youth Union | 19,482 | CC BY-NC-SA.[12] |
| Enciclopedia Libre Universal en Español | Encyclopedic/Spanish | Spanish language fork of Wikipedia | 47,281[13] | CC BY-SA 3.0 |
| Encyclopedia of Mathematics | Mathematics | MediaWiki using MathJax extension[14] | 16,211[15] | CC BY-SA 3.0 |
| Encyclopedia Dramatica | Parody of Internet memes | Parody-themed wiki | 14,972 | Fair use |
| Everipedia | Encyclopedic | 6,000,000[16] | CC BY-SA 4.0 | |
| Fallout Wiki | Fiction/Gaming – Fallout series | Wiki about the Fallout video game series. Ongoing merger with "Nukapedia" (Fandom) and "The Vault" (Curse/Gamepedia). | 46,000[17] | CC BY-SA |
| Family History Research Wiki | Genealogy research | Reference information and research guidance. In 11 languages. | 82,857[18] | CC BY-SA 3.0 US |
| Fandom | Pop culture and media franchises | Wiki hosting service. It is a collection of many wikis, each focusing on a different subject. | more than 40,000,000 articles[19] | CC BY-SA 3.0[20] |
| Fanlore | Fandom | Fandom and transformative works, with a focus on fannish history and activities. Powered by MediaWiki. | 60,753[21] | CC BY-NC 3.0 US[22] |
| Foodista.com | Reference – Food and Cooking | Creative Commons structured wiki about foods, recipes, and other culinary information. | CC BY | |
| La Frikipedia | Parody of encyclopedia | Spanish language parody of Wikipedia. | 11,159[23] | GFDL |
| Fringepedia | Fiction – Fringe, related 'fringe science' topics | Powered by MediaWiki. | 6,759[24] | CC BY-NC-SA |
| Gardenology.org | Gardening | Meant as a "complete plant and garden wiki encyclopedia" | 22,005[25] | CC BY-SA |
| GCpedia | Government — Canada | Internal Government of Canada Wiki | ||
| GeoNames | Places | Geographical database that links specific names with unique features | ||
| GitLab wikis | Mainly computer software program documentation | |||
| Glottopedia | Linguistics – Multilingual | A Wiki on linguistics and languages | 3,227[26] | |
| Heraldry of the World | Encyclopedic – Multilingual | A wiki dealing with non personal heraldry | 139,558[27] | |
| Heroes Wiki | Fiction – Heroes | Articles about the TV show Heroes. | ||
| Hitchwiki | Encyclopedic – Multilingual | Adatabaseonhitchhiking that includes an interactive world map showing the best and worst places to catch a ride. | 3,867[28] in English and about 2,000 more in 16 different languages.[29] | |
| Intellipedia | Government – Intelligence | Three non-accessible wikis running on networks that link the U.S. intelligence community | ||
| International Music Score Library Project | Music | Wiki library of public domain musical scores | 14,800[30] | GFDL |
| Internet Movie Firearms Database (IMFDb) | Firearm usage in Film, Television and Videogames | Runs on MediaWiki | 27,723[31] | |
| JurisPedia | Government – Law | Multi-lingual academic encyclopedia, including Arabic, Chinese (Simplified Chinese), English, French, German and Spanish | CC BY-NC | |
| Know Your Meme | Fiction – website and video series | 28,105[32] | ||
| Lostpedia | Fiction – Lost | Articles about episodes, characters, themes, etc. in the television show. | 7,457[33] | CC BY-NC-ND |
| LyricWiki | Music – Lyrics | Listing of lyrics by album | 1,737,000[34] | Mostly copyrighted. CC BY-SA for minority of content. |
| MeatballWiki | Communities – Online communities | 5,213[35] | Copyrighted | |
| Memory Alpha | Fiction – Star Trek | Contains canon-only material | 58,548[36] | CC BY-NC 4.0 |
| Metapedia | Encyclopedia | White nationalist and extreme right-wing online encyclopedia. | 7,896[37] | Unknown |
| MicroWiki | Micronationalism | Runs on MediaWiki. | 39,703[38] | CC BY-SA 4.0 |
| MyWikiBiz | Misc – Business directory | Allows people and enterprises to write about themselves | 9,093 | GFDL and other[39] |
| Namuwiki | Encyclopedic/Korean | 602,837 | CC BY-NC-SA 2.0 KR | |
| nLab | Mathematics, physics, and philosophy wiki | For research-level notes, expositions and collaborative work, including original research, especially from the n-categorical point of view. | 18,098[40] | No formal license. Freely reusable if source acknowledged. |
| OpenStreetMap | Places – Maps | Uses GPS, aerial photography and other free sources of images to create a map of the world | ODbL 1.0 | |
| OpenWetWare | Science – Biology | Promotes sharing and dissemination of knowledge related to biological research | CC BY-SA | |
| PCGamingWiki | Games – PC games | Aims to provide fixes and information on all PC games | 45,508[41] | CC NC-SA 3.0 |
| PlanetMath | Misc – Mathematics | Free wiki-style mathematical encyclopedia | ||
| PsychonautWiki | Psychonautics and Psychotropics | |||
| Proteopedia | Science – Chemistry | A 3D encyclopedia of proteins and other molecules | 191,915[42] | Copyrighted |
| RationalWiki | Encyclopedic | Information and articles are written from a liberal, skeptical[43] and secular point of view as a response to Conservapedia | 7,434[44] | CC BY-SA 3.0 |
| Rangjung Yeshe Wiki | Himalayan Buddhism, Tibetan Dictionary | Tibetan-English Dictionary, Buddhist Glossaries, Biographies of Buddhist Teachers, and Resources | 23,721[45] | CC BY-NC-SA / GFDL |
| Rosetta Code | Computers — source code | Powered by MediaWiki | 2,045[46] | GFDL 1.2 |
| Runiversalis | Encyclopedic | 2,040,397[47] | CC BY-SA 3.0 | |
| Ruwiki | Encyclopedic | 1,913,845[48] | CC BY-SA 4.0 | |
| Scholarpedia | Encyclopedic | Written exclusively by professionals focusing on their field of expertise; subject to peer review | 1,812[49] | Copyrighted |
| SCP Foundation | Fiction — horror, science fiction, urban fantasy | Fictional secret organization documented by the collaborative writing wiki project of the same name | 15,000 | CC BY-SA 3.0 |
| Sensei's Library | Misc – Go (game) | WikiWiki Web site running on GoWiki, a custom wiki based on PhpWiki. | 18,200 | OPL |
| SKYbrary | Aviation safety information | Runs on MediaWiki. | ||
| SNPedia | Science – Biology | Database of research and information about single-nucleotide polymorphisms, including medical consequences for people who have DNA info about themselves | 195,101[50] | CC BY-NC-SA 3.0 |
| Sogou Baike | Encyclopedic / Simplified Chinese | Simplified Chinese encyclopedia | 900,000 | |
| Stadtwiki Karlsruhe | Encyclopedic | Multilingual city wiki for Karlsruhe | 21,157[51] | CC BY-NC-SA |
| Supernatural Wiki | Fiction – Supernatural | The wiki for the hit TV show Supernatural | 4,224[52] | |
| TermWiki | Words in different languages | Social learning network built around terms and questions in 75 languages. | 1,417,806[53] | |
| Travellerspoint | Places – Travel | Social networking site dedicated to sharing stories and recommendations about travel | 8,578[54] | CC BY-SA 3.0 |
| TV Tropes | Encyclopedic | Focuses on documenting tropes in various media | 551,245[55] | CC BY-NC-SA |
| UK LGBT Archive | LGBT history, United Kingdom | Building towards a comprehensive history of LGBT (Lesbian, Gay, Bisexual, Transgender) life in the United Kingdom. Previously the LGBT History Project.[56] Runs on MediaWiki. | 4,654[57] | CC BY-SA 3.0 |
| Uncyclopedia | Satire – Parody | Satirical encyclopedia dedicated to parody, notably parodying Wikipedia. Has 2 "official" English versions due to a split. | 37,749[58] | CC BY-NC-SA 2.0 |
| Veropedia | Selected English Wikipedia articles | A free, advertising-supported Internet encyclopedia project | ||
| Vienna History Wiki | History of the city of Vienna, Austria. | The main content of the wiki are persons, buildings, topographical objects (streets, parks, waters, districts...), organisations, events and other items (such as special German expressions used in Vienna) | 185,636[59] | CC BY-NC-ND |
| WikiAnswers | General knowledge | Compiles answers to questions posed | 11,265,000[60] | Copyrighted |
| WikiArt | Art, paintings | Project aims to create high-quality, complete and well-structured online repository of fine art. | 75,000[61] | Public domain artworks |
| Wikibooks | General – textbooks | Wikimedia project | 378,467[62] | CC BY-SA/other |
| Wikidata | Wikimedia project | 111,041,529 items | CC0 1.0, CC BY-SA 4.0 | |
| WikiEducator | Open educational resources | Open educational resources which anyone may use, adapt, and share | 25,652[63] | CC BY-SA and CC BY |
| WikEM | Emergency Medicine | Rapid reference for practical point-of-care clinical knowledge with a popular linked point-of-care phone application. Intended for clinicians only and not directly for patients. | 4,704[64] | CC BY-NC-ND 4.0 |
| WikiFeet (including WikiFeet Men) |
Foot fetishism | Directory of pictures of celebrities' feet | ||
| wikiHow | How-to articles | A wiki how-to manual | 166,386[65] | CC BY-NC-SA 3.0 |
| WikiIslam | Criticism of Islam | 977[66] | CC BY-NC 3.0 | |
| Wikimapia | Places – Map | Combines Google Maps with a wiki system for polygonally defined areas; currently supports 35 languages | 13,300,000 | CC BY-NC-SA[67] |
| Wikimedia Commons | Misc – Electronic media | Repository of free electronic media; a Wikimedia project | 106,893,028 files | CC BY-SA and some other free licenses |
| Wikinews | General – News | Collaborative news service, a Wikimedia project | 1,755,456 articles | CC BY |
| Wikipedia | Encyclopedic | Multilingual Wikimedia project that uses MediaWiki | 63,335,359 articles | CC BY-SA 3.0 for text (July 15, 2009–now). Files have various licenses. Dual license under GFDL and CC BY-SA 3.0 for text (November 1, 2008 – July 15, 2009). GFDL for text (–November 1, 2008). |
| Wikiquote | Reference – Quotations | Quote repository; a Wikimedia project | 327,818 articles | CC BY-SA |
| WikiShia | Shi'a Islam | Online encyclopedia focusing on Shi'a, the second major denomination in Islam. It has articles in 8 languages. Persian has the most articles which is more than 3500.[68] | 4,443[69] in English | Unknown |
| Wikisource | Reference – Primary sources | Digital library of free content textual sources; a Wikimedia project | 6,102,480 articles | CC BY-SA |
| Wikispecies | Science – Biology | Directory of species; a Wikimedia project | 880,718 articles | GFDL and CC BY-SA |
| Wikitravel | Places – Travel | Travel guide using Wikimedia's software, but unconnected to the Wikimedia Foundation (which hosts Wikivoyage). 20 supported languages | 62,345[70] | CC BY-SA 3.0 |
| WikiTree | Genealogy | Free global family tree using MediaWiki software, but unconnected to the Wikimedia Foundation. | 11,148,296[71] | Unknown[72] |
| Wikiversity | General – Self-directed learning | Supports free learning communities, projects, materials, and learners; a Wikimedia project | CC BY-SA 3.0 | |
| Wikivoyage | Places – Travel | Multilingual travel guide of the Wikimedia Foundation. | 135,768 articles | CC BY-SA 3.0 |
| WikiWikiWeb | Computer programming, specifically design patterns | World's oldest wiki (began circa 1995) | 34,997[11] | GPL |
| Wiktionary | Multilingual dictionary | Online dictionary; a Wikimedia project | 40,138,515 articles | CC BY-SA 3.0 |
| Wookieepedia | Fiction – Star Wars | Science fiction encyclopedia | 193,079[73] | CC BY-SA 3.0 |
| Wowpedia / WoWWiki | Gaming – Warcraft | Contains in-universe material | 168,466[74] (Wowpedia); 105,351[75] (WoWWiki) | CC BY-SA 3.0 |
| 360 Baike[76] | Encyclopedic / Simplified Chinese | Simplified Chinese encyclopedia |
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