Free References 

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xrefer : A collection of online reference tools, whose database contains encyclopedias, dictionaries, thesauri, books of quotations and a growing range of subject-specific titles.

Information Please: On-Line Dictionary, Internet Encyclopedia, Atlas, & Almanac Reference :The most comprehensive free ready reference on the Internet. Find the answers to frequently asked questions in almanacs, dictionary, encyclopedia, atlas.

Encarta : A good starting point for research. Easy to use, concise, but not the same as the Deluxe version.

Biography : Over 25,000 greatest lives, past and present. "Born on this day" feature and "this week on biography" for A&E.