Quick Reference Sites
50 States and Capitals
Bartleby's Reference--anatomy of human body,
encyclopedia, dictionary, language, style, quotations
and literature history
Bible (King James Version)
Birding Hotspots around the World
Calculators Online
Calendars through the Ages
Ceremonies for Jewish Living
Currency Converter
Daylight Saving Time
Earth Calendar
eHow--How Things Get Done
Flags of the World
How Far is It?
How Much is it Worth Today?
How Stuff Works
Mother's Day
Merck Veterinary Manual
Nobel Prizes
Phobia List
Psychology of Color
Radio Locator
Reference and User Services Association

Robert's Rules of Order
Rules
Useful Reference Sites
Savings Bond Calculator
SoYouWanna--how to do things
State Birds
Today's Highlights in History
Unit Conversion
United States: States
US Military Aircraft
Water Information (50 states)
Weights and Measures
Weights & Measures Calculators
What is a Dollar Worth?
World Time Server
World Time Zones

Acronym
Acronym Finder
Acronym and Abbreviation Server

Almanac
Farmers' Almanac
Infoplease.com

Countries
Africa Resources.com
Background Notes
Country Commercial Guides
Country Profiles (BBC)
Country Studies 
Country Reports
Embassy World
European Governments Online
Foreign Government Resources
World Factbook (CIA)
Worldwide Governments

Dictionaries
American Heritage Dictionary
Dict.org
Dictionary.com
Dictionary of Phrase and Fable
French-English Dictionary
Dictionary of Difficult Words
Latin Language and Literature
OneLook
Roget's Thesaurus
Skeptic's  Dictionary
Spell Checker
YourDictionary.com (multilinqual dictionaries)
WWWebster Dictionary
WWWebster Thesaurus
Wordsmyth
WebTranslator (AltaVista)

Encyclopedia
Britannica.com
Columbia Encyclopedia
The Catholic Encyclopedia
Encyclopedia Mythica--mythology, folklore and legend
Encyclopedia of Philosophy
GLTBQ: an encyclopedia of gay, lesbian, bisexual, transgender, & queer culture
Stanford Encyclopedia of Philosophy
Titanic Encyclopedia

Quotations
Annabelle's Quotation Guide
Quoteland
Quoteworld.org
Bartlett's Book of Quotations
LitQuotes
MemorableQuotations.com
Simpson's Contemporary Quotations
Quotable Women

Statistics
Bureau of Economic Analysis
Bureau of Labor Statistics
Consumer Price Indexes (CPI)
Demographic Data of Other Countries
Digest of Education Statistics
Economic Statistics -- current Federal economic indicators, including: Employment, Income, International, Money Output, Prices, Production, and Transportation.
Education Statistics
Extreme Weather Sourcebook
Fast Facts
Facts About Newspaper (NAA)
Federal Statistics
Gary Price's List of Lists
Health Statistics
Occupational Employment & Wage Statistics
Statistical Data Center
Sourcebook of Criminal Justice Statistics
Statistical Abstracts of U.S.
Statistical Resources on the Web (U. Mich.)
U.K. Statistics
U.S. Gazeteer
United States Counties
World Gazetteer--current population figures for cities, towns of all countries
Working in the 21st  Century
Work Place Violence

Style 
Citation Guide: APA, MLA, Chicago -- Williams College
Columbia Guide to Online Style
Elements of Style

Symbols
Symbols.com

Timelines
Timelines
Perpetual Calendar