Product Code Database
This page contains a list of that use a wiki model.
| A Million Penguins | Fiction—collaboratively written novel | This wiki no longer exists. | A Million Penguins:Special:Statistics | Copyrighted |
| AboutUs.org | Internet directory | Initially pre-populated with information about many different websites. Uses MediaWiki software, but now largely with Ruby on Rails | GFDL and CC-BY-SA | |
| Appropedia | English, French, German, Spanish | Sustainable development, including appropriate technology merging with several other wikis | CC-BY-SA 3.0 | |
| Baidu Baike | Encyclopedic/Chinese | A Chinese encyclopedia | Copyrighted | |
| Ballotpedia | Informative | An interactive almanac of United States politics. | Ballotpedia Statistics retrieved 1/25/12, 11:02am CT | GFDL |
| Biographicon | Misc—Biographies of people | A directory of personal profiles; shut down in 2008 | Unknown | |
| 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. | ||
| Citizendium | Encyclopedic | Requires writers to use real names rather than usernames; guided by expert input while allowing edits from the general public | Citizendium – Category:CZ Live lists the number of clusters. Citizendium also contains subpages: see Citizendium – Special:Statistics for details. | CC-by-sa 3.0 |
| Connectipedia | and foundations | funded and maintained by Meyer Memorial Trust. Runs on Wagn | GNU Free Documentation License and a Creative Commons License | |
| Congresspedia | Government—United States Congress | A separately branded sub-section of SourceWatch, since moved to OpenCongress | CC-BY-SA 3.0 | |
| Conservapedia | Encyclopedia | Information and articles are written from a conservative Christian viewpoint aimed at correcting the alleged liberal bias of Wikipedia. | Copyrighted (free use) | |
| Choral Public Domain Library (CPDL) | Music | A wiki library of free typeset musical scores | Public Domain, CPDL Licence, C.C. Licences, Copyrighted (free use) | |
| DavisWiki | Place—Davis, California | A city wiki dedicated solely to Davis; at one point the largest city wiki | CC-by 3.0 | |
| Diplopedia | Government—Diplomacy | Encyclopedia of the U.S. Department of State collecting items related to international relations and diplomacy | ||
| EcuRed | A Cuban perspective on global issues, in Spanish | Run by Cuba's Youth Computer Club, an affiliate of the Communist Youth Union | Compatible with the copyleft license Creative Commons Attribution-ShareAlike 3.0 Unported | |
| Ekopedia | Multilingual—Encyclopedic | Environmental sustainability merging with Appropedia. | CC-BY-SA 3.0 | |
| Enciclopedia Libre Universal en Español | Encyclopedic/Spanish | A Spanish language fork of Wikipedia | CC-BY-SA 3.0 | |
| Encyclopedia Dramatica | Satire of | A satirical wiki | http://www.encyclopediad*amatica.com/Special:Statistics | Fair use |
| Encyclopedia of Mathematics | Mathematics | CC-BY-SA 3.0 | ||
| English Wikipedia | Encyclopedic | Public access, most prominent English wiki | 0 | CC-BY-SA |
| Foodista.com | Reference—Food and Cooking | A Creative Commons structured wiki about foods, recipes, and other culinary information. | CC-BY | |
| Fringepedia | Fiction— Fringe | |||
| Galaxiki | Fictional galaxy | Dedicated to the creation of a fictional galaxy | GFDL | |
| Gardenology.org | Gardening | Meant as a "complete plant and garden wiki encyclopedia" | Creative Commons Attribution ShareAlike | |
| GCPEDIA | Government | Internal Government of Canada Wiki | ||
| GeoNames | Places | A geographical database that links specific names with unique features | ||
| Geo-wiki | Global land cover maps | The Geo-Wiki Project is to help improve the quality of global land cover maps. | ||
| Heroes Wiki | Fiction— Heroes | CC-NC-ND | ||
| Hudong (互动百科) | Encyclopedic | Largest Chinese wiki. Social Networking features. Chinese language only | Copyrighted | |
| Intellipedia | Government—Intelligence | Three non-accessible wikis running on networks that link the U.S. intelligence community | ||
| International Music Score Library Project | Music | A wiki library of public domain musical scores | GFDL | |
| Internet Movie Firearms Database (IMFDb) | Firearm usage in Film, Television and Videogames | Runs on MediaWiki | ||
| Javapedia | Computers—Java | An online encyclopedia for developing Java | Creative Commons | |
| Judgepedia | Informative | An interactive encyclopedia of courts and judges. | Judgepedia Statistics retrieved 1/25/12, 11:02am CT | GFDL |
| JurisPedia | Government—Law | A multi-lingual academic encyclopedia, including Arabic, Chinese, English, French, German and Spanish | CC-NC | |
| LGBT History Project | LGBT history, United Kingdom | Building towards a comprehensive history of LGBT (Lesbian, Gay, Bisexual, Transgender) life in the United Kingdom. Runs on MediaWiki. | CC-BY-SA 3.0 | |
| Lostpedia | Fiction— Lost | Articles about episodes, characters, themes, etc. in the television show. | CC BY-NC-ND | |
| LyricWiki | Music—Lyrics | A listing of lyrics by album | Mostly copyrighted. CC-BY-SA for minority of content. | |
| Medpedia | Encyclopedic Medical/health | Requires real names; guided by medical expert input while allowing edits from the general public | CC-BY-SA | |
| MeatballWiki | Communities—Online communities | Copyrighted | ||
| Memory Alpha | Fiction— Star Trek | Contains canon-only material | CC-NC 2.5 | |
| MetaBase | database of biological databases | 1000 biological databases and over 800 'web services', more than 50 'user-contributed' databases | BioLicense and MetaBase:Copyrights | |
| Metapedia | Encyclopedia | A white nationalist and extreme right-wing online encyclopedia. | (Hungarian Language version) | unknown |
| MyWikiBiz | Misc—Business directory | Allows people and enterprises to write about themselves | GFDL and other | |
| OpenStreetMap | Places— | 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—Video games | Attempts to provide fixes and information on all | as of April 30, 2013 | CC-NC-SA 3.0 |
| PlanetMath | Misc—Mathematics | Free wiki-style mathematical encyclopedia | ||
| Pornopedia | Sexuality | Multilingual encyclopedia about pornography and sexuality Pornopedia: Sexstar Till Kraemer (32) gründet geile Enzyklopädie Bild, February 18, 2010 | (German version) | Copyrighted |
| Rangjung Yeshe Wiki | Himalayan Buddhism, Tibetan Dictionary | Tibetan-English Dictionary, Buddhist Glossaries, Biographies of Buddhist Teachers, and Resources | cc-by-nc-sa / GFDL | |
| riscos.info | ComputersRISC OS | Hosts C programming resources and projects | cc-by 2.5 | |
| Scholarpedia | Encyclopedic | Written exclusively by professionals focusing on their field of expertise; subject to peer review | Copyrighted | |
| Sensei's Library | Misc—Go | OPL | ||
| ShopWiki | Misc—Products | A shopping wiki and product comparison search engine featuring buying guides and shopping resources | ||
| SKYbrary | Aviation safety information | |||
| SNPedia | Science—Biology | A database of research and information about , including medical consequences for people who have DNA info about themselves | CC-by-nc-sa 3.0 | |
| SourceWatch | Social—Propaganda | Formerly Disinfopedia, discusses propaganda and includes organizations that seek to influence public opinion | GFDL | |
| Stadtwiki Karlsruhe | Encyclopedic | Multilingual city wiki for Karlsruhe | CC-BY-NC-SA | |
| Susning.nu | Encyclopedic/Swedish | A Swedish language encyclopedia, which competes with Swedish Wikipedia | Copyrighted | |
| TermWiki | Words in different languages | A social learning network built around terms and questions in 75 languages. | ||
| The Student Room | Place—UK University and student life | Offers UK university guides, revision notes, examples of university personal statements and information on student life and university courses | ||
| Travellerspoint | Places—Travel | A social networking site dedicated to sharing stories and recommendations about travel | CC-BY-SA 3.0 | |
| TV Tropes | Encyclopedic | Focuses on documenting tropes in various media | CC-BY-SA 3.0 | |
| Uncyclopedia | Satire—Parody | A group of satirical encyclopedias which parody Wikipedia in multiple languages | (in English) | CC-by-nc-sa 2.0 |
| The Vault | Fiction/Gaming— Fallout | Science Fiction wiki; migrated to Curse, inc in 2011 | CC-BY-SA | |
| Vikidia | Encyclopedic/Spanish and French | A Spanish and French language encyclopedia for children ages 8–13 | GFDL/CC-BY-SA | |
| Wikia | A hosting service for wikis: Wiki farm | Focus on entertainment and gaming wikis. | ||
| WikiAnswers | General knowledge | Compiles answers to questions posed | Copyrighted | |
| Wikibooks | General— | A Wikimedia project | CC-BY-SA/other | |
| WikiCandidate | Fictional presidential campaign | A virtual campaign for a fictional U.S. presidential candidate. A project of Cornell University. | ||
| Wikicollecting | Encyclopedia | A free to join community to create an up-to-date and reliable guide to the world of collecting, covering all areas from action figures to wine. | Creative Commons Attribution-ShareAlike 3.0 | |
| WikiEducator | Open educational resources | Open educational resources which anyone may use, adapt, and share | CC-BY-SA, and CC-BY | |
| wikiHow | How-to articles | A wiki how-to manual | CC-by-nc-sa 3.0 | |
| WikiIndex | List of | A wiki containing an index of wikis, wiki people and wiki ideas | CC-BY-SA | |
| WikiMapia | Places—On-line map | Combines Google Maps with a wiki system for polygonally defined areas; currently supports 35 languages | CC by-nc-sa | |
| Wikimedia Commons | Misc—Electronic media | A of free electronic media; a Wikimedia project | CC-BY-SA and other | |
| Wikinews | General—News | Collaborative news service, a Wikimedia project | CC-BY | |
| Wikipedia | Encyclopedic | Multilingual Wikimedia project that uses MediaWiki | CC-BY-SA | |
| Wikiquote | Reference— | A quote ; a Wikimedia project | CC-BY-SA | |
| Wikisource | Reference— | Dedicated to use on Wikipedia; a Wikimedia project | CC-BY-SA | |
| Wikispecies | Science—Biology | A directory of species; a Wikimedia project | GFDL/CC-BY-SA | |
| Wikitravel | Places—Travel | A travel guide using Wikimedia's software, but unconnected to the Wikimedia Foundation (which hosts Wikivoyage). 20 supported languages | CC-BY-SA 3.0 | |
| Wikiversity | General—Self-directed learning | Supports free learning communities, projects, materials, and learners; a Wikimedia project | CC-BY-SA 3.0 | |
| Wikivoyage | Places—Travel | A multilingual travel guide of the Wikimedia Foundation. | CC-BY-SA 3.0 | |
| WikiWikiWeb | Computer programming, specifically design patterns | World's oldest wiki (began circa 1995) | GPL | |
| Wiktenauer | Encyclopedic | An open database dedicated to the masters, manuals, and techniques of Historical European martial arts (HEMA) | CC-BY-SA-3.0 | |
| Wiktionary | Multilingual dictionary | An online dictionary; a Wikimedia project | CC-BY-SA 3.0 | |
| Wookieepedia | Fiction— Star Wars | Science fiction encyclopedia | CC-BY-SA | |
| WoWWiki | Gaming— Warcraft | Contains in-universe material; migrated to Wowpedia in 2010 | (WoWWiki); (Wowpedia) | CC-BY-SA 3.0 |
| ZineWiki | Social—Independent media | A zine encyclopedia |
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