Web Search Engines
Here are some search engines with wide breadth of coverage and usable search interfaces. Each search engine contains a different set of web sites and each has different rules for searching. Read the "information" to find out what a search engine covers, and check "search tips" for each engine to make a more effective search.
A9: http://a9.com AlltheWeb: http://www.alltheweb.com
AltaVista: http://www.altavista.com
Ask Jeeves: http://www.ask.com
Gigablast: http://www.gigablast.com
Google: http://www.google.com
Hakia: http://hakia.com
HotBot: http://www.hotbot.com
MSN Search: http://search.msn.com
Teoma: http://www.teoma.com
Yahoo!: http://www.yahoo.com
Kartoo: http://www.kartoo.com
Thumbshots: http://ranking.thumbshots.com
For a web interface with links to lots of search engines see Sputtr: http://www.sputtr.com.
Web Subject Directories
A subject directory is a service that offers a collection of links to Internet resources submitted by site creators or evaluators and organized into subject categories. Directory services use selection criteria for choosing links to include, though the selectivity varies among services. Most directories are searchable.
Academic Info: http://www.academicinfo.net
BUBL Information Service: http://bubl.ac.uk
Google Directory: http://directory.google.com
Infomine: http://infomine.ucr.edu
Internet Public Library: http://www.ipl.org
Internet Scout: http://scout.wisc.edu
Librarians Index to the Internet: http://lii.org
Open Directory: http://www.dmoz.org WWW Virtual Library: http://vlib.org
More Search Engine Information
Search Engine Watch: http://searchenginewatch.com A guide to search engines, search engine registration and ranking issues.