Meta Search Engines Meta-search engines search multiple search engines.

• Dogpile
  Dogpile is a meta-search engine that searches Internet search engines and directories such as About, Ask Jeeves, FindWhat, Google, LookSmart, and many more. 
• Ixquick Metasearch
  A powerful meta-search engine. 
• Metacrawler
  Search using a selection of search engines that you choose. 
• Moonmist Meta-Search
  Meta-search engine developed in the UK. 
• qbSearch
  You select the search engines you wish to search. Currently 17 available to choose from. 
• Surfwax
  A popular meta-search engine. 
• Vivisimo
  A meta-search engine that clusters search results [Recommended].