1- About.com (www.about.com)
2- AllTheWeb (www.alltheweb.com)
3- AltaVista (www.altavista.com)
4- Ask Jeeves! (www.askjeeves.com)
5- Excite (www.excite.com)

6-HotBot (www.hotbot.com)
7-LookSmart (www.looksmart.com)
8-Lycos (www.lycos.com)
9-Open Directory (www.dmoz.org)
10-Google (www.google.com)
11-Mamma (www.mamma.com)
12-Webcrawler (www.webcrawler.com)
13-Aol (www.aol.com)
14-Dogpile (www.dogpile.com)
15-10pht (www.10pht.com)