Encyclopedia Britannica Offers news, links, and access to abbreviated encyclopedia entries. http://www.britannica.com/

Information Please Offering millions of useful and interesting facts on a wide range of topics. http://www.infoplease.com/

1911 Encyclopedia Britannica Features the entire 1911 edition online with 29 volumes and articles written by more than 1500 authors. http://www.1911encyclopedia.org/

The Canadian Encyclopedia Online Searchable full-text version. Features articles, retrospectives, interactive maps, games, and more. http://www.thecanadianencyclopedia.com/

Literary Encyclopedia Features author biographies, text profiles, timelines, and glossary of literary terms. http://www.LitEncyc.com/

Platonic Realms Math quotes, mini-texts and definitions. http://www.mathacademy.com/

Probert Encyclopaedia Reference resource containing entries addressing various life topics. http://www.probertencyclopaedia.com/

Rudiments of Wisdom Encyclopaedia As drawn by cartoonist Tim Hunkin. A to Z index of thousands of illustrated topics and themes. http://www.rudimentsofwisdom.com/

Eb.com Provides complete text of Encyclopaedia Britannica with search capabilities, related links, and multimedia enhancements. http://www.eb.com/

How Stuff Works Articles explain how hundreds of things work, from elements of the human body to space-age technology. http://www.howstuffworks.com/

Informationsphere.com Free online encyclopedia that allows users to submit their own articles for inclusion in its database. http://www.informationsphere.com/

The Probert Encyclopaedia Reference source with several hypertext linked entries covering a broad variety of subjects. http://www.probert-encyclopaedia.co.uk/

Quisdom The encyclopedia of trivia. Includes such things as the definitions of acronyms and abbreviations, flags of the world. http://www.quisdom.com/

Encyclopedia of Canadian Theatre Thorough coverage of present and past theater news and productions. http://www.canadiantheatre.com/

Peakware World Mountain Encyclopedia Includes reference information such as height, location, first ascent data, links, and many more. http://www.peakware.com/

Virtualsources.com Find information on every country in the world. http://www.virtualsources.com/

The Book of Threes Read and contribute on the both natural and unnatural occurrences or the number three. http://www.threes.com/

EngineersWorldwide.com Worldwide directory for the design, engineering and construction industries. http://www.engineersworldwide.com/

Cyclepedia Motorcycling information, repair manuals, technical data, and useful statistics organized by manufacturer. http://www.cyclepedia.com/

Catalanian Hiperenciclop่dia Contains the most comprehensive collection of terms related to Catalonia extracted from the Gran Enciclop่dia Catalana. http://www.catalanencyclopaedia.com/