The following are all major search engines:

http://www.google.com
http://www.google.co.uk
http://www.yahoo.com
http://www.yahoo.co.uk
http://www.askjeeves.com
http://uk.ask.com/
http://www.alltheweb.com
http://search.aol.com/
http://www.hotbot.co.uk/
http://www.teoma.com
http://www.teoma.co.uk/
http://www.altavista.com
http://uk.altavista.com/
http://www.gigablast.com
http://www.looksmart.com
http://www.lycos.co.uk/
http://search.msn.com
http://search.msn.co.uk/
http://search.netscape.com
http://www.searchenginecolossus.com/