Can anybody tell me about other search engine?

yes i want to know the same..

i think the google is the seo engine in the market. i am following only Google.

ask.com is another emerging search engine..

I don't see the need to be stressed out about other search engines. If a web page ranks high in the result pages of the most important search engines, namely Google, Yahoo and Bing, it should be more than enough from SEO point of view (the others have a much lower traffic anyway).
I have checked out polycola, mamma, dogpile, duckduckgo, viewzi... but just for fun

Multi-search engines (also called metasearch engines and metacrawlers) send your search query to several search engines at the same time and compile the results for you. However, they are restricted to quite simple searches.

Dogpile, Ask.com

There are many searchengine besides google.
One of most usable search engine is bing and also provide good services.
Thanks.

Why you want to know about other search engine. Google is the best one. How you will get benefits from another search engines ???

There are about more than 500 search engines which can be used. Try to go for Google search engine.