Free Search Engines URL Submission
Listed below are Search Engine URL Submission Pages that you must try for better visibility of your site
Google: https://www.google.com/webmasters/tools/submit-url [ Requires an Account]
Yahoo: https://siteexplorer.search.yahoo.com/
Bing: http://www.bing.com/webmaster/SubmitSitePage.aspx
Baidu Url Submission: http://www.baidu.com/search/url_submit.html (China's #1 Search Engine)
ScrubTheWeb: http://www.scrubtheweb.com/addurl.html
BeamedSearch: http://www.beamed.com/search/AddURL.html
Yellow Pages: http://www.bestyellow.com/addurl.html
Mixcat Search: http://mixcat.com/addurl.html
SearchWarp: http://searchwarp.com/AddURL.asp
DinoSearch: http://dinosearch.com/dinosearch/addurl.asp
Walhello: http://www.walhello.com/addlinkgl.html
Evisum: http://search.evisum.com/addsite.htm
Anoox: http://www.anoox.com/add_for_indexing_free.jsp
UnAsked: http://unasked.com/addurl.asp
WebSqash: http://www.websquash.com/cgi-bin/search/search.pl?Mode=AnonAdd
The-Search-Site: http://www.the-search-site.com/add_url_form.asp
WhatUSeek: http://www.whatuseek.com/addurl.shtml
TowerSearch: http://www.towersearch.com/addurl.php
ExactSeek: http://www.exactseek.com/add.html
SearchHippo: http://www.searchhippo.com/addlink.php
GigaBlast: http://www.gigablast.com/addurl
EntireWeb: http://www.entireweb.com/eng/basic/
Web World Index: http://www.webworldindex.com/cgi-bin/pseek/addurl.cgi
IntelSeek: http://www.intelseek.com/add_url_form.asp
Major Russian Search Engines
Yandex: http://webmaster.yandex.ru/addurl.xml
Please don't use any automated search engine submission tools for at least the above search engines as they are really important for your SERP's. Apart from these there are a huge number of small time search engines which help you get the backlinks.
Free Directory URL Submission
Listed below are Directory URL Submission Pages that you must try for better visibility of your site.
DMOZ: http://dmoz.org/add.html
Yahoo Directory: http://docs.yahoo.com/info/suggest/
JoeAnt: http://www.joeant.com/ [Only Paid Inclusion]
WannaLearn: http://www.wannalearn.com/