The search engines listed here provide 99% of all searches done on the Internet. Make sure you add your stite to DMOZ many search sites including Google uses DMOZ as a source
Google
By far the most important search engine. Google powers Yahoo!, AOL, Netscape, and several others. Add your URL here:
http://www.google.com/addurl.html
It's highly recommended that you read this:
http://www.google.com/webmasters/seo.html
Dmoz
Directions on how to add your site to the Open Directory are here:
http://dmoz.org/add.html
You will need to find the most appropriate category in the directory, and click on the "Add URL" button in the upper right hand corner.
If you try to stuff the description with keywords an editor may leave your site in unreview, or delete it. Try to describe your site in a balanced manner.
Yahoo!
Non-commercial sites may be submitted for consideration for free. Commercial sites require an annual payment of $299 to be considered for inclusion.
http://docs.yahoo.com/info/suggest/
Inktomi
Inktomi provides SERPs to many high profile portals. Add your URL here:
http://ink.ineedhits.com/
Overture
The Overture SE is a pay per click search engine. Minimum click cost is 5 cents. Overture has a very wide distribution including MSN Search, Yahoo!, Lycos, AltaVista, and InfoSpace.
http://www.overture.com/d/USm/about/advertisers/
AltaVista
In December, 30.1 million unique users performed 505m queries on AltaVista.
Submit for free here:
http://addurl.altavista.com/addurl/new
LookSmart
LookSmart uses a pay per click format, charging 15 cents per click. Submit here:
http://listings.looksmart.com/submit/
LookSmart also uses, and owns, Zeal web directory listings. Only non-commercial sites can submit to Zeal. Go to:
http://zeal.com/
Fast/ AllTheWeb
The FAST search engine provides SERPs in several high traffic portals, including Lycos. Submit your URL for free here:
www.alltheweb.com/add_url.php
WebCrawler
https://secure.ah-ha.com/guaranteed_inclusion/teaser.aspx
JoeAnt
JoeAnt allows you to add your own site if you first become an editor. The application process is very easy and this directory is supported by a community of editors that will welcome you in warmly.
http://www.joeant.com/suggest.html
GoGuides No longer free $69.95
Also free to submit:
http://www.goguides.org/info/addurl.htm