| Site |
Language |
Description |
Access |
| Aeiou Encyclopedia |
German, English |
Online database of Austrian culture |
Free |
| Allmusic |
English |
Music-related topics |
Retail sites |
| Archimedes-lab.org |
English |
Edutainment |
Free |
| ARKive |
English |
Visual and audio recordings of the world's species |
Free |
| Australian Dictionary of Biography |
English |
Entries on notable Australians who have died |
Free |
| Baidu Baike |
Chinese |
Collaborative online encyclopedia hosted by the major Chinese search engine Baidu |
Free |
| Banglapedia |
Bangla, English |
General interest |
Free |
| Battlestar Wiki |
English, Simple English, German, Spanish, Turkish, Malay, French, Chinese |
Battlestar Galactica related articles |
Free |
| Bulbapedia |
English, French, German, Japanese, Polish, Portuguese |
Pokémon related articles |
Free |
| Campaigns Wikia |
English |
Political issues and campaigns |
Free |
| The Canadian Encyclopedia |
English |
General Interest (original content of the hard copy Canadian Encyclopedia) |
Free |
| Catholic Encyclopedia |
English |
Topics relating to Catholicism |
Free, Public domain |
| Chinese Encyclopedia |
Chinese |
General interest |
Free |
| Christian Cyclopedia |
English |
A collection of historical and theological information |
Free |
| Citizendium |
English |
Wiki-based free encyclopedia project spearheaded by Larry Sanger, co-founder of Wikipedia |
Free |
| Columbia Encyclopedia |
English |
General interest |
Free |
| Compton's Encyclopedia |
English |
General interest |
Free |
| Congresspedia |
English |
Seeks to improve on public information through articles about US Congress specifics |
Free |
| Conservapedia |
English |
Written from a viewpoint supportive of Conservative Christianity and Young Earth creationism |
Free |
| Crnogorska Enciklopedija |
Montenegrin |
General interest (hopes to encourage a Montenegrin language Wikipedia) |
Free |
| Cut-the-knot |
English |
Mathematics related topics |
Free |
| Cyclopaedia of Political Science |
English |
Articles pertaining to science, economics, and American authors. The 1899 edition is available online |
Free |
| Deu Sözlük |
Turkish |
General interest |
Free |
| A Dictionary of Greek and Roman Antiquities |
English |
Incorporates text from the 19th century encyclopedia of the same name. Focuses on topics of cultural and historical Greek and Roman significance. |
Free |
| Dictionary of Greek and Roman Biography and Mythology |
English |
Focuses on topics dealing with Greek and Roman mythology and people |
Free |
| Dictionary of Greek and Roman Geography |
English |
Focuses on topic relating to Greek and Roman geography |
Free |
| Dictionary of New Zealand Biography |
English, Maori |
Entries on notable New Zealanders who have died |
Free |
| Digital Universe |
English |
Collection of articles on educational, cultural, and scientific topics |
Free |
| Diplopedia |
English |
US State Department internal encyclopedic wiki, available for diplomats and overseas US agents to use |
Access only through the State Department |
| dKosopedia |
English |
A political encyclopedia written from a left/progressive/liberal/Democratic point of view |
Free |
| Don Markstein's Toonopedia |
English |
Focuses on articles pertaining to print and animated cartoons |
Free |
| Doosan Encyclopedia |
Korean |
General |
Free |
| Easton's Bible Dictionary |
English |
Articles on Christianity and theology |
Free, Public Domain |
| Encarta |
English |
General interest |
Limited free access and features, subscription for full access |
| Encyclopedia of Alabama |
English |
Articles on the state of Alabama |
Free |
| Encyclopedia Astronautica |
English |
Contains articles on the subject of space exploration and astronomy |
Free |
| Encyclopaedia Biblica |
English |
Contains articles pertaining to "the Literary, Political and Religious History, the Archaeology, Geography, and Natural History of the Bible"[1] |
Free |
| Encyclopædia Britannica |
English |
General interest |
Limited free access and features, subscription for full access |
| Encyclopedia of China |
Chinese |
General interest |
Free |
| Encyclopedia Dramatica |
English |
Satirical articles on internet culture |
Free |
| Encyclopedia of Earth |
English |
Articles and the Earth and its ecosystems |
Free |
| Encyclopaedia Metallum |
English |
Articles deal with topics encompassing Heavy metal music |
Free |
| Encyclopaedia of Mathematics |
English |
Encompasses articles on the topic of mathematics |
Free |
| Encyklopedia Internautica |
Polish |
General interest |
Free |
| Encyclopedia Iranica |
English, plans for a future Persian version |
Topics on the influence of the Iranian peoples throughout history |
Free |
| Encyclopedia of Korean Culture |
Korean |
Korea-related topics |
Free |
| Enciclopedia Libre |
Spanish |
Fork of the Spanish Wikipedia, using wiki software, released under the GFDL |
Free |
| Encyclopedia Mythica |
English |
Contains articles on mythology, folklore, and religion |
Free |
| Encyclopedia of Life |
English, French |
Seeks to categorize all 1.8 million known species on the planet |
Free |
| Encyclopedia of Life Sciences |
English |
Biology related articles |
Subscription |
| Encyclopedia of Life Support Systems |
English |
Articles about the natural and social sciences |
Subscription |
| Encyclopedia of Marxism |
English |
Topics related to the study of Marxism |
Free |
| Encyclopedia of Ukraine |
English |
Ukraine related articles |
Free |
| Encyclopædia Universalis |
French |
General interest encyclopedia published by Encyclopedia Britanica |
Subscription |
| Encyclopedia Virginia |
English |
Articles on Virginia's history and culture |
Free |
| Encyclopedia of World Problems and Human Potential |
English |
Presents articles on perceived human problems |
Free |
| EqWorld |
English, Russian, German, French, Italian, Spanish |
Articles on mathematical equations |
Free |
| Everything2 |
English |
General interest, users can submit articles on the topic of essentially anything |
Free |
| FAQ |
English |
A collection of searchable FAQs |
Free |
| FishBase |
English, Spanish, Portuguese, French, German, Italian, Dutch, Chinese (Simplified Han), Chinese (Traditional Han), Bahasa Malay, Indonesian, Greek, Swedish, Russian, Farsi, Vietnamese, Thai, Lao, Hindi, Bangla |
Articles on fish species |
Free |
| Flora Europaea |
English |
Covers different plant species |
Free |
| Gale Virtual Reference Library |
English |
Database for search of source material of an academic nature |
Subscription |
| Gazetteer for Scotland |
English |
Articles on the geography and locations of Scotland |
Free |
| glbtq.com |
English |
Entries on notable homosexuals |
Free |
| GNUPedia |
English |
General interest articles are released under a GNU license |
Free |
| Grand Larousse encyclopédique |
French |
General interest |
Free |
| Grolier Multimedia Encyclopedia |
English |
Targeted at the younger researcher, it contains the text of the American Academic Encyclopedia |
Subscription |
| H2G2 |
English |
Collection of sometimes humorous encyclopedia articles, based on Douglas Adams's The Hitchhiker's Guide to the Galaxy. |
Free |
| Harpers Dictionary of Classical Antiquities |
English |
Covers subjects of classical antiquity |
Free |
| HistoryLink |
English |
Articles on the history of Washington State |
Free |
| Holocaust Encyclopedia |
English, Arabic, Farsi, French, Spanish |
Holocaust related articles |
Free |
| Hoodong |
Chinese |
General interest. China's largest wiki |
Free |
| Hutchinson Encyclopedia |
English |
General interest |
Free |
| HyperTrek |
Italian |
Articles detailing subjects in the Star Trek universe |
Free |
| Infoplease |
English |
General interest |
Free |
| Internet Encyclopedia of Philosophy |
English |
Philosophy related articles |
Free |
| Internetowa encyklopedia PWN |
Polish |
General interest |
Free |
| Interpedia |
English |
General interest, the first site to propose a free encyclopedia written by users. Now defunct. |
No longer exists |
| Javapedia |
English |
Coverage of all topics related to the Java platform |
Free |
| Jewish Encyclopedia |
English |
The state of Judaism and the Jews as of 1901 |
Free |
| Jewish Virtual Library |
English |
Portals to essential Jewish topics |
Free |
| Jurispedia |
Arabic, English, Chinese, French, German, Spanish, Dutch |
An academic encyclopedia on the concepts of law |
Free |
| Kalb Encyclopedia |
Esperanto |
General interest. The first online Esperanto encyclopedia |
Free |
| Kdo byl kdo |
Czech |
Biographies on notable Czech and Slovak people |
Free |
| Keyinpedia |
Chinese |
General interest |
Free |
| Knol |
English |
General interest |
Free |
| Kussmaul Encyclopedia |
English |
General interest with emphasis on science and the arts. First commercial online encyclopedia (1981-93). |
Subscription |
| Lambiek |
English, Dutch |
Articles on comic strips and comic artists |
Free |
| The Literary Encyclopedia |
English |
Literature related articles |
Subscription |
| Lostpedia |
English, German, Spanish, French, Italian, Japanese, Dutch, Polish, Portuguese, Russian, Chinese |
Contains articles pertaining to the hit drama Lost |
Free |
| LyricWiki |
English |
A searchable encyclopedic database of song lyrics |
Free |
| Marefa |
Arabic |
General interest |
Free |
| MathWorld |
English |
Articles on a wide variety of math related topics |
Free |
| Medcyclopaedia |
English |
Articles on medical imaging used in radiology and radiography |
Free |
| Medpedia |
English |
Medical content (tentative launch in 2008) |
Free |
| Memory Alpha |
English, German, Dutch, Portuguese, Swedish, Czech, Spanish, Esperanto, French, Russian, Serbian, Chinese (Simplified Han), Japanese |
Star Trek related content |
Free |
| Memory Beta |
English |
Star Trek related content |
Free |
| Meyers Konversations-Lexikon 4. ed. 1888 - 1892 |
German |
General interest |
Free |
| MOOMA |
Hebrew |
Articles on Israeli music and musical artists |
Free |
| MusicBrainz |
English |
Database of audio albums |
Free |
| MyWikiBiz |
English |
A wiki encyclopedia that allows people and enterprises to write about themselves |
Free |
| Nationalencyklopedin |
Swedish |
General interest, the most comprehensive contemporary Swedish language encyclopedia |
Subscription |
| New Advent |
English |
Articles on Catholicism and apologetics |
Free |
| New Georgia Encyclopedia |
English |
Articles on the U.S. state Georgia |
Free |
| New World Encyclopedia |
English |
General interest |
Free |
| Nupedia |
English |
Combined with GNUpedia |
Free |
| On-Line Encyclopedia of Integer Sequences |
English |
Encyclopedia of number sequences (what is next term after 1,2,4,9,20,48,115, ..., say?) |
Free |
| Open Site |
English |
Categorized community-built encyclopedia, inspired by the Open Directory Project |
Free |
| Oregon Blue Book |
English |
Articles pertaining to Oregon |
Free |
| The Oregon Encyclopedia |
English |
Articles pertaining to Oregon |
Free |
| Panyathai |
Thai, limited English |
General interest. Designed to honor the Thai king Bhumibol Adulyadej |
Free |
| PlanetMath |
English |
Math related topics and articles |
Free/GNU |
| Private Sözlük |
Turkish |
Collaborative hypertext Turkish dictionary and encyclopedia site that shares a similar concept with Everything2 or H2G2 |
Free |
| Probert Encyclopaedia |
English |
General interest |
Free |
| Project Galactic Guide |
English |
Inspired by The Hitchhiker's Guide to the Galaxy |
Free |
| Quid |
French |
General interest |
Free |
| The Rocklopedia Fakebandica |
English |
Articles on fake bands from popular entertainment |
Free |
| Routledge Encyclopedia of Philosophy |
English |
Philosophy articles |
Subscription |
| SIKART |
English, German, French, Italian |
Biographical dictionary and database of Swiss visual art |
Free |
| Scholarpedia |
English |
Articles are written by scholars and peer-reviewed for accuracy |
Free |
| Stanford Encyclopedia of Philosophy |
English |
Philosophy subjects |
Free |
| Store norske leksikon |
Bokmål |
General interest |
Free |
| Susning.nu |
Swedish |
A Swedish language wiki |
Free |
| TAGIPEDIA |
Arabic, English |
Articles on Arab heritage and content |
Free with registration |
| Te Ara Encyclopedia of New Zealand |
English, Māori |
The New Zealand government site with content on the country |
Free |
| TV Tropes Wiki |
English |
Encyclopedia of literary tropes |
Free |
| Veropedia |
English, Dutch, Spanish |
Mirrors stable versions of selected English Wikipedia articles |
Free |
| Vikidia |
French, Spanish |
Articles designed for children ages 8-13 |
Free |
| Virtualology |
English |
Encyclopedia of historical documents and biographies |
Free |
| WIEM Encyklopedia |
Polish |
General interest |
Free |
| Wikipedia |
See list here |
Wiki-based free general interest encyclopedia |
Free, Copyleft |
| WikiPilipinas |
English |
Based on the Wikipedia model, from the Philippine point-of-view |
Free |
| Wikispecies |
English |
Seeks to create a catalogue of all living things |
Free |
| Wikiweise |
German |
German language wiki |
Free |
| WikiZnanie |
Russian |
Russian language wiki |
Free |
| Wookieepedia |
English, German, Spanish, Bulgarian, Danish, Finnish, French, Croatian, Hungarian, Italian, Japanese, Dutch, Norwegian, Polish, Portuguese, Russian, Romanian, Slovak, Slovenian, Swedish, Chinese |
Star Wars related articles |
Free |
| World Book Encyclopedia |
English |
General interest |
Subscription |
