Yahoo!  (http://www.yahoo.com)
Lycos (http://www.lycos.com)
Infoseek (http://www.infoseek.com)
Webcrawler (http://www.webcrawler.com)
Excite (http://www.excite.com)
Altavista (http://www.altavista.digital.com)
Mozilla (http://directory.mozilla.org)
Euroseek (http://www.euroseek.com)