General     By Subject      For Experts

• Internet Public Library
  • Type your subject into the search box, or browse through comprehensive subject indexes
• Kids Click
  • A search engine created and edited by librarians to provide some of the best sites for your search
• Teoma
  • A new search engine with two valuable features: Refine gives "suggestions to narrow your search," and Resources are "link collections from experts and enthusiasts"

By Subject

• Animal Search
  • Search for a specific animal, or browse by animal type or group, organizations related to animals or geographical regions
• http://www.biography.com/
• The Biography Channel
  

For Experts

• InvisibleWeb
  • For those really specific and hard to find subjects, InvisibleWeb is one of the best places to search for information that may be hidden from other search engines