Facts and Figures

Some great sites for finding good, hard, data and statistics (oooooooh...fun!):
Bureau of Labor Statistics
EDGAR (Securities and Exchange commission)
Elemental Data Index
FedStats
The Gallup Organization
National Center for Educational Statistics
Official Statistics on the Web
Pew Research Center
Pew Internet and American Life Project
Polling Report.com
US Census Bureau

We the People...

Here are some resources for finding government documents or information:
Ben's Guide to the US Government for Kids
Constitution Finder
Federal Citizens Information Center(FCIC)
Foreign Government Resources on the Web
Government Documents
GPO Access
House of Representatives
IRS.gov
Senate
State and Local Government on the Web
Thomas(by LOC)
USA.gov
White House.gov

Directory assistance

Here are some useful online directories:
Beaucoup
Digital Librarian
Google Directories
History of Science on the WWW
Library Spot
Martindale's Reference Desk
Open Directory Project
Reference Page
Virtual Sites
Yahoo Directory of Directories

And we wonder why people are afraid to ask librarians for help...

This is hilariously creepy:

Best List ever

This is the ALA's 2006 list of the Best Free Reference Websites.
It rules.

Where are you going, where have you been

These sites on Geography, Countries and Travel will help you get where you're going and tell you what you'll find there:
50 States and Capitals
Alexandria Digital Library
CitySearch
Country Studies
GEOnet Names Server
Getty Thesaurus of Geographic Names
Google Maps
Mapquest
Perry-Castaneda Library Map Collection
Sperling's Best Places
TopoZone
World Fact Book
WWW Virtual Library: Geography
National Atlas of the U.S.

Getting to know you, Getting to know all about you...

To dig up the dirt on a person- alive,dead, or even make believe- these free Biography sites beat hiring a private detective:
All Music Guide
American President.org
African Americans in the Sciences
American Women's History
AskArt- info on American artists
Biography.com
Biography Center
Biographical Dictionary
Biographical Directory of the United States Congress
Chemical Achievers: The Human Face of the Chemical Sciences
IMDB
InfoPlease: Biographies
In the First Person
Mathematicians: Index of Biographies
PBS Biographies
Saints and Angels
Time 100
Virtual American Biographies: Continental Discover to 1899
Who's Alive, Who's Dead

Encyclopedia Brown

These actually have nothing to do with the wacky, freckled, neighborhood sleuth we all know and love; they're just some great free online Encyclopedia sites:
Britannica
Canadian Encyclopedia
Catholic Encyclopedia
Encarta
Encylopedia of Chicago
Encyclopedia of Library and Information Science
Encyclopedia of the Orient
Encylopedia Mythica
Encyclopedia of Psychology
Encyclopedia Smithsonian
InfoPlease
Medline Plus
Oxford Reference Online
Stanford Encylopedia of Philosophy

In Reference to your query...

These are some very credible sites which have compiled free Virtual Reference Resources covering a variety of academic and general interest subjects:
Bartleby
BUBL Link
Infomine
Internet Public Library
Librarian's Internet Index
Purdue University
Robart's Research Library
Virtual Reference Shelf (compiled by the LOC)
The WWW Virtual Library

Words, Words, Words

Some great online Dictionaries and Thesauri for finding words, looking up words, analyzing words, etc.:
Dictionary.com
Dictionary of American Regional English
Encarta World English Dictionary
Encyberpedia
Merriam Webster Online
ODLIS
Oxford English Dictionary
Thesaurus.com
Wordsmyth
Your Dictionary.com

Librarians are so cool...

This article rocks!