General reference sites offer a wealth of information at the click of a mouse. Many are compiled by librarians or other experts in their field.
Bartleby – Online literature and reference books.
Digital Librarian – Resources organized by subject.
Internet Scout Project – Weekly summary of new and newly discovered online resources. Searchable archives. From the University of Wisconsin at Madison.
LibrarySpot – Online libraries, encyclopedias, and reference links.
Onelook – Over 700 online dictionaries.
Refdesk – News and reference links.
Reference Desk – Well-organized and extensive.
Virtual Reference Desk – Organized by subject. From Christopher C. Brown at the University of Denver.