Subject Directories

Librarians Index to the Internet - http://lii.org
Looksmart - www.looksmart.com
Open Directory Project (ODP) - www.dmoz.com
Yahoo - www.yahoo.com

Search Engines

Alltheweb - www.alltheweb.com
Alta Vista - www.altavista.com
Google - www.google.com
HotBot - www.hotbot.com
Wisenut - www.wisenut.com

Metasearch Engines

C|Net - www.search.com
Ixquick - www.ixquick.com
Surfwax - www.surfwax.com
Vivisimo - www.vivisimo.com

Gateways

Lycos - www.lycos.com
MSN - www.msn.com
WWW Virtual Library - http://vlib.org/Home.html

Specialized Sites

Ask.com - www.ask.com
CompletePlanet - www.completeplanet.com
Internet Public Library - www.ipl.org/ref

Annotated reviews of Web sites and search services

ACRLNews - http://www.ala.org/acrl/resrces.html

Information and statistics about search engines

Online Magazine - http://www.onlineinc.com/online/default.htm
Search Engine Watch - www.searchenginewatch.com
SearchEngineShowdown - www.searchengineshowdown.com