Search Tools

Google
Indexes more than 1 billion URLs. The search page is very clean and easy to use.

Bing

Infomine
"INFOMINE is a comprehensive virtual library and reference tool for academic and scholarly Internet resources, including Web sites, databases, electronic journals, bulletin boards, listservs, online library card catalogs, articles, directories of researchers, and other types of information."

Yahoo
This search tool is great for beginners and subject browsing.