http://www.altavista.digital.com
Alta Vista directory and search engine, good place to start to look for information.

http://www.yahoo.com
Directory and search engine.

http://guide.infoseek.com
Infoseek web directory and search engine. Easy to use.

http://www.euroseek.net/index?ifl=uk
Web directory and search engine which allows searches in different languages and can be limited to different regions of the world.

http://www.hotbot.com
Search engine and web directory.