Online Quick Reference Tools

Quick Reference

Currency Converter
Local Weather
Martindale's Reference Desk
Merriam-Webster Dictionary
Online Conversion
Quotations
Thesaurus
Switchboard.com - Search white and yellow pages for people and businesses
YourDictionary.com - English, specialized, and foreign language dictionaries

US, Local, & Regional Information

State Governments
U.S. Census Bureau Statistics
U.S. Zip Codes and Postal Rates

Maps & Countries

CIA World Factbook
Geographic Names Information System
Library of Congress Country Studies
MapQuest.com - Maps and driving directions

Virtual Reference Libraries

Refdesk.com - a mega-reference site with quick reference, subject reference, and newspapers
The Internet Public Library - from the University of Michigan School of Information, IPL provides library resources and services, includes access to newspapers, magazines, books, and authoritative websites on many subjects

Organizations

General Education Online - links to colleges and universities worldwide
Idealist - nonprofit and community organizations, volunteer centers and museums - whether public or private, includes job and internship opportunities