Bartlett's Familiar Quotations

Bartleby.com
Reference source for literature, English usage, religion, etiquette, and more

CIA World Factbook
In-depth information and maps for every country of the world

Citation Machine

CREDOreference   
Search hundreds of reference books at one time

Dewey Decimal Guide to Popular Subjects

Elements of Style
The principle requirements of plain English style, highlighting the rules of usage most commonly violated

Fiction Catalog   
Selected annotated list of fiction for adults

Gale Virtual Reference Library   
Cover to cover reference titles in a searchable database

Infoplease
Links to reference information, including atlases, almanacs, dictionaries and encyclopedias

Internet Public Library
Wide variety of subjects covered in addition to Ready Reference and Reading Room

Karla's Guide to Citation Styles

Librarians' Index to the Internet
A subject directory to annotated Internet information sources

National Center for Health Statistics

Online!
A guide to citing electronic resources using various citation styles

Refdesk.com
Index to quality Internet information sites as well as Ready Reference facts on a multitude of subjects

Robert's Rules of Order

Statistical Abstract of the United States     
Contains over 1,400 tables and graphs on social, economic, demographic, and political subjects