A search engine searches out web pages and categorises them automatically. The programs that do this are known as "spiders" or "robots". A search directory doesn't use programs to generate the data for its search results, instead all of the entries are added manually by the people who look after the directory. This means that a search engine can include more pages in the database that is searched but a search directory is more likely to produce more useful results.
Note that while all of the links on this page open in a separate window they will all use the same window so that you will only have one extra window open while using the links on this page.
The following is a list of the top five search engines and directories. I suggest that if you want to get visitors to your site you need try to get listed with as many of these as possible.
If these aren't enough for you then the following links will take you to the pages to add your site to lots more search engines and directories - Aeiwi, Amfibi, Altavista, AMRAY, Any Search Info, Big Finder, Buzzle, CanLinks, Cipinet, Claymont, Clickey, DogPile, EntireWeb, ExactSeek, Excite, Ezilon, Gimpsy, Go4.it, IllumiRate, Info Tiger, Jayde, JDGO, Look, Lycos, MetaSearch, MixCat, NetSearch, National Directory, Overture, Qango, ScrubTheWeb, Search Ave, SearchEngine.com, SearchHippo, SearchFeed, SearchIt, SearchKing, SearchSight, Shoula Search, SplatSearch, Starting Point, Subjex, SurfGopher, TowerSearch, TurnPike, Walhello, WebCrawler, Web World, WebbieWorld, WebSquash, What U Seek, WiseNut, World Site Index, WWWRIOT, and Zeezo.
If you have a site in the Australian .au domain then the following search engines and directories specific to Australia may also be worth trying to get listed in - AAA Smart Shopping, Howz@t, Sensis, and Web Wombat.