Dictionaries and Thesauri

KnowPlay
Quick and efficient reference searches for dictionaries, thesauruses, encyclopedias, maps, quotations, and more.   Bookmark this one!

Merriam-Webster Online

Wordsmythe Dictionary and Thesaurus

Dictionary.com

Roget's II: The New Thesaurus
Containing 35,000 synonyms and over 250,000 cross-references in an easy-to-use format.

Reference Resources

Electronic Reference Desk

The Reference Desk

DeskRef

KidsClick!
Web search for kids - by Librarians

New York Times Learning Center

Biographical References

A&E Biography

Biographical Dictionary
Over 28,000 biographies

Maps and Flags

Flags Of All Countries

National Geographic Maps

WorldAtlas.com

About.com Maps

Outline Maps
Maps are in .pdf files.