While going through my favorites I found 2 more reference tools to share.  Some day I'll get it all categorized. LOL

Great online research tool for Science

http://www.exploratorium.edu/explore/index.html

Internet encyclopedia on mythology, folklore, and religion

http://pantheon.org/

Babel Fish Translation – translate English into any language using this site

http://babelfish.altavista.com/translate.dyn

Online dictionary

http://dictionary.reference.com/

Medical dictionary

http://www.medterms.com/script/main/hp.asp

Another translator dictionary

http://www.freetranslation.com/

Life Science dictionary

http://biotech.icmb.utexas.edu/pages/dictionary.html

Merriam-Webster online

http://www.m-w.com/

One look dictionary and translation

http://www.onelook.com/

Ask a question awesome library

http://www.awesomelibrary.org/Office/Main/Involving_Students/Ask_a_Question.html

How stuff works

http://www.howstuffworks.com/

The Internet Public Library

http://www.ipl.org/

Virtual Reference Desk

http://www.refdesk.com/

Surfing the net with kids

http://www.surfnetkids.com/

Schoolwork.org homework help

http://www.schoolwork.org/

Quick access to the best Internet tools

http://www.itools.com/

Visual Thesaurus

http://www.visualthesaurus.com/?vt

The World Fact book

http://www.odci.gov/cia/publications/factbook/

Color landform atlas of the United States

http://fermi.jhuapl.edu/states/states.html

World Atlas: Maps and Geography of the world

http://geography.about.com/library/maps/blindex.htm?once=true&

Afro-American Almanac

http://www.toptags.com/aama/index.htm

Baseball Almanac

http://baseball-almanac.com/

Infoplease is an almanac, dictionary, encyclopedia, atlas, and thesaurus

http://www.infoplease.com/

Very cool site that is like infoplease but geared towards kids. 

http://www.factmonster.com/

The Writer’s Almanac

http://writersalmanac.publicradio.org/

The Old Farmer’s Almanac

http://www.almanac.com/