Google
Google search engine employs text-matching techniques to find pages that are both important and relevant to a user's search.
Yahoo
Probably the easiest and most popular way to find information on the Internet. Yahoo is actually a massive directory of sites rather than a true search engine.
Dogpile
Full Boolean searching of multiple engines (if allowed in the specific database). It can look into ftp sites, Usenet, mailing lists, and web pages simultaneously.
Ask.com
Ask.com offers many innovative tools to help you get the information you need quickly and easily.
HotSheet
HotSheet web quick reference. The original single page web directory, with over 500 carefully selected premier sites. The easy way to the best of the web.