DirectoryFamily.com offers family website links to browse for education, careers, health, recreation, sports, travel, reference, science, home and family.
Answers.com
A free, ad-supported, reference search service, created to provide you with instant answers on over a million topics. http://www.answers.com/
The Probert Encyclopaedia
Serious reference source with over 60,000 fully hypertext linked entries covering the entire spectrum of human knowledge. Content is aimed at journalists and researchers.
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The unconventional Guide to Life, the Universe and Everything. It's like an encyclopedia, only better because all the entries are written by people like you!