Alta Vista http://www.altavista.com/
Yahoo Search http://search.yahoo.com/
MSN http://search.msn.com/
Excite http://www.excite.com/
Alltheweb http://www.alltheweb.com/
Terra http://www.terra.com/
Google http://www.google.com/
LookSmart http://www.looksmart.com/
AOL Search http://search.aol.com/
Netscape http://search.netscape.com/
Lycos http://www.lycos.com/
DMOZ http://www.dmoz.com/
Teoma http://www.teoma.com/
MSN UK http://search.msn.co.uk/
Hotbot http://www.hotbot.com/
DogPile http://www.dogpile.com/
Overture http://www.overture.com/
WiseNut http://www.wisenut.com/
WebCrawler http://www.webcrawler.com/
Ask Jeeves http://www.ask.com/
Alexa http://www.alexa.com/
EuroSeek http://www.euroseek.com/
Go Network http://www.go.com/
About http://www.about.com/
TOCC http://www.tocc.co.jp/
資料來源：http://moretool.blogspot.com/2010/05/25.html
