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Canadian Encyclopedia

The Canadian Encyclopedia is a source of information on Canada. It is available online, at no cost. The Canadian Encyclopedia is available in both English and French and includes some 14,000 articles in each language on a wide variety of subjects including history, popular culture, events, people, places, politics, arts, First Nations, sports and science.

Catalogue of Life

The Catalogue of Life is planned to become a comprehensive catalogue of all known species of organisms on Earth by the year 2011. Rapid progress has been made recently and this, the eighth edition of the Annual Checklist, contains 1,105,589 species. Please note that this is probably just more than half of the world's known species. This means that for many groups it continues to be deficient.

Conservapedia

Conservapedia is an English-language wiki-based web encyclopedia project written from an Americentric socially conservative and Conservative Christian point of view. It was started in 2006 by lawyer and history teacher Andrew Schlafly, son of conservative activist and Eagle Forum founder Phyllis Schlafly. He stated that he founded the project because he felt that the open-source web encyclopedia Wikipedia had a liberal, anti-Christian, and anti-American bias.

Don Markstein's Toonopedia

Don Markstein's Toonopedia (subtitled "A Vast Repository of Toonological Knowledge") is a Web encyclopedia of print and animated cartoons. While the site aims for comprehensiveness, it makes little or no pretense of having a neutral point of view. Markstein is the sole writer and editor of Toonopedia.

Encarta

Encarta is a digital multimedia encyclopedia published by Microsoft Corporation. As of 2005, the complete English version, Encarta Premium consists of more than 68,000 articles, numerous images and movies, and homework tools, and is available on the World Wide Web by yearly subscription or by purchase on DVD-ROM or multiple CD-ROMs. Many articles can also be viewed online free of charge, a service supported by advertisements.

Enciclopedia Libre Universal en Español

Enciclopedia Libre Universal en Español is a Spanish language wiki encyclopedia, released under the GNU Free Documentation License. It uses the MediaWiki software.

Encyclopaedia of Mathematics

The Encyclopaedia of Mathematics is a large reference work in mathematics. It is available in book form, on CD-ROM, and can also be browsed online for free. The 2002 version contains more than 8,000 entries covering most areas of mathematics at a graduate level, and the presentation is technical in nature. The encyclopedia is edited by Michiel Hazewinkel and was published by Kluwer Academic Publishers until 2003, when Kluwer became part of Springer. The CDROM contains animations and three-dimensional objects.

Encyclopedia Astronautica

The Encyclopedia Astronautica is a reference web site on space travel. A comprehensive catalog of vehicles, technology, astronauts, and flights, it includes information from most countries that have had an active rocket research program, from Robert Goddard to the NASA Space shuttle to the Soviet Shuttle Buran. It is maintained by space enthusiast Mark Wade, who has been collecting such information for most of his life.

Encyclopedia of Earth

The Encyclopedia of Earth (also EoE) is an electronic reference about the Earth, its natural environments, and their interaction with society. The Encyclopedia is described as a free, fully searchable collection of articles written by scholars, professionals, educators, and other approved experts, who collaborate and review each others' work. The articles are written in non-technical language and are intended to be useful to students, educators, scholars, and professionals, as well as to the general public.

Encyclopedia of Life

Encyclopedia of Life (EOL) is a free, online collaborative encyclopedia intended to document all of the 1.8 million species of living organisms known to science. The EOL went live on February 26, 2008 with 30,000 entries. The site immediately proved to be extremely popular, and temporarily had to revert to demonstration pages for two days when it was overrun by traffic from over 11 million views it received. It is compiled from existing databases and from contributions by experts and non-experts throughout the world. It aims to build one "infinitely expandable" page for each species, including video, sound, images, graphics, as well as text. In addition, the Encyclopedia will incorporate the Biodiversity Heritage Library, which will contain the digitized print collections from the world's major natural history libraries. The project is initially backed by a $50 million funding commitment, led by the MacArthur Foundation and the Sloan Foundation.

Encyclopædia Britannica

The Encyclopædia Britannica is a general English-language encyclopaedia published by Encyclopædia Britannica, Inc., a privately held company. The articles in the Britannica are aimed at educated adult readers, and written by a staff of about 100 full-time editors and over 4,000 expert contributors. It is widely perceived as the most scholarly of encyclopaedias.

Encyclopædia Universalis

The Encyclopædia Universalis is a French-language general encyclopedia published by Encyclopædia Britannica, Inc., a privately held company. The articles of the Encyclopædia Universalis are aimed at educated adult readers, and written by a staff of full-time editors and expert contributors. It is widely considered to be the most scholarly of French-language encyclopedias.

FishBase

FishBase is a comprehensive database of information about fish. As of October 2007, it included descriptions of over 30,000 species, over 260,000 common names in hundreds of languages, over 45,000 pictures, and references to more than 40,000 works in the scientific literature.

Encyclopædia Iranica

Encyclopædia Iranica is a project whose goal is to create a comprehensive and authoritative English language encyclopedia about the history, culture, and civilization of Iranian peoples from prehistory to modern times. It is a project of Columbia University, started in 1973 at its Center for Iranian Studies, and is considered the standard encyclopaedia of the academic discipline of Iranistics. The scope of the encyclopedia goes beyond Persia (Iran) and encompasses other geographical areas where Iranian languages dominated at certain times: Afghanistan, Tajikistan, Anatolia and Kurdistan, as well as some regions of the Caucasus, South Asia, Central Asia, and Mesopotamia. Relations of the Iranian world with other cultures (China, Europe, etc.) are also covered. The project has published 12 volumes, and is planning on publishing a total of up to 30 volumes. The full text of entries is available for free viewing online. (PC and Mac users require a simple free font download to display words showing their correct characters and accents, but this is not necessary for casual viewing.)

Jewish Encyclopedia

The Jewish Encyclopedia was an encyclopedia originally published between 1901 and 1906 by Funk and Wagnalls. It contained over 15,000 articles in 12 volumes on the history and then-current state of Judaism and the Jews as of 1901. It is now a public domain resource.

MathWorld

MathWorld is an online mathematics reference work, created and largely written by Eric W. Weisstein. It is sponsored by Wolfram Research Inc. and partially funded by the National Science Foundation's National Science Digital Library grant to the University of Illinois at Urbana-Champaign.

PlanetMath

PlanetMath is a free, collaborative, online mathematics encyclopedia. The emphasis is on peer review, rigour, openness, pedagogy, real-time content, interlinked content, and community. Intended to be comprehensive, the project is located at the Digital Library Research Lab at Virginia Tech.

Uncyclopedia

Uncyclopedia, "the content-free encyclopedia that anyone can edit", was founded in 2005 as an English-language wiki featuring satirically themed articles. It is formatted as a parody of Wikipedia and aims ultimately to parody all encyclopedic subjects. Originally an English-language wiki, the project currently spans over 50 languages with almost 100,000 pages of content.

Wikipedia

Wikipedia (pronunciation ) is a free, multilingual, open content encyclopedia project operated by the United States-based non-profit Wikimedia Foundation. Its name is a portmanteau of the words wiki (a technology for creating collaborative websites) and encyclopedia. Launched in 2001 by Jimmy Wales and Larry Sanger, it is currently the largest, fastest-growing, and most popular general reference work on the Internet. Wikipedia is a project that attempts to summarize all human knowledge.