Reference
Dictionaries
- Merriam-Webster Collegiate Dictionary
- Cambridge Dictionary
- Encarta Dictionary
- American Heritage Dictionary
- Ask Oxford
- One Look Dictionary
- Wordsmyth
- Wiktionary
- Allwords.com
- The Free Dictionary
- Yahoo! Dictionary
Thesauri
- Merriam-Webster Collegiate Thesaurus
- Roget’s II: The New Thesaurus
- Library of Congress Thesauri
- Yahoo! Thesaurus
Word Tools
Encyclopedia
- Wikipedia
- Encarta
- Britannica
- World Book
- Encyclopedia.com
- Columbia Encyclopedia
- Information Please
- The Canadian Encyclopedia
- Everything 2
- Stanford Encyclopedia of Philosophy
- Yahoo! Encyclopedia
Quotations
- Bartlett's Familiar Quotations
- Quote Land
- Quote World
- Simpson’s Contemporary Quotations
- Quotes of the Day
History
Conversions
Math & Science
- Math.com
- WebMath
- Math Forum
- Ask Dr. Math
- Discovery.com
- Extreme Science
- Science Whatzit
- Science Magazine
- USGS Education
- Education World
- Space.com
- Periodic Table
- System Development Life Cycle
ITLnet Articles