Bartleby.com The preeminent Internet publisher of literature, reference and verse providing students, researchers and the intellectually curious with unlimited access to books and information on the Web free of charge.
DMOZ Open Directory Project – Reference The largest, most comprehensive human-edited directory of the Web. It is constructed and maintained by a vast, global community of volunteer editors. Look here for links to dictionaries, thesauri, almanacs, maps and encyclopedias.
ipl2 Created by a merger of the Internet Public Library and the Librarians’ Internet Index to aggregate quality information resources available for free on the Internet. The site also allows users to pose questions to librarians for quick answers.
RefDesk A free and family-friendly web site that indexes and reviews quality, credible, and current web-based resources and has been in operation since 1995.
Reference.com Provides access to millions of encyclopedic entries from five licensed and proprietary reference sources. Searchers use Dictionary.com, Thesaurus.com, Reference.com and other sites for language reference and educational games on the Internet.
Wikipedia A multilingual, web-based, free-content encyclopedia project based on an openly-editable model. The name "Wikipedia" is a portmanteau of the words wiki (a technology for creating collaborative websites, from the Hawaiian word wiki, meaning "quick") and encyclopedia. Wikipedia's articles provide links to guide the user to related pages with additional information.
WordReference.com The WordReference Dictionaries are free online translation dictionaries. The most popular dictionaries are the Spanish Dictionary, French Dictionary and the Italian Dictionary.