This is the most important part for your website. According to different surveys, The Google is the most popular search engine in the world. Google handles roughly 60% of world wide search and yahoo is on the second number.

Once you have developed your site for search engines on the web then you have to submit that site to search engine. It's a very easy process to submit your website in search engine and once you have done it, your site will be crawled by search engines and your pages will be indexed soon.   Here is the list of famous search engines and a link for submission. 

1- Google

http://www.google.com/addurl/

2-Yahoo

http://search.yahoo.com/info/submit.html

 3-MSN

http://www.bing.com/docs/submit.aspx

4- Ask

Ask.com is no longer offering a Site Submission program. But you may submit sitemap by this way:

http://submissions.ask.com/ping?sitemap=http%3A//www.the URL of your sitemap here.xml

You will find hundreds of thousands of search engines where you can submit your URLs as well as thousands of companies that are offering you to submit your URLs in thousands of search engines by paying them but have you ever realized what's the use? When you have the most popular search engines such as google, yahoo, bing(formerly msn) ask etc..which cover more than  90% of search in world wide web and offer you free submissions, is that not enough? 

Do you know that some second category search engines are also based on above search engines? 

Search engines based on Google :

- Aol Search

- Compuserve Search

- Myspace Search

- Netscape

- Ripple

Search Engines based on Yahoo :

- Altavista

- Alltheweb

- Ecoho

- Forestle

- Goodsearch

- Rectifi

Search Engines based on Msn : 

- A9

- Alexa

- Tafiti

- Msdewey

Search Engines based on Ask.com

- Hakia

- Lycos

- Iwon

Another good way to submit your URLs to most famous search engine is through Sitemap since yahoo, google and msn are the members of sitemaps.org.

How to submit sitemap is an advance option for the beginners but you may go through the article sitemaps.

SEO TIP:

Sometimes you don't need to submit your website to search engines because their spiders/crawlers will find your website and will index within one week. So, just wait for some days and if you don't see your website, do as said in this article.