Mostly used search engines other than google, yahoo and bing 1. altavista, 2. lycos 3. dogpile 4. blekko
It Depends Upon the Geographical location and reliability of Search Engine.. In China Biadu is most useful search engine.. While in Muslim Community ImHalal.com is most popular.. Ask.com, Altavista, Lycos, Dogpile are other popular search engine as well..
Have you ever tried the SE , soso.com. It is chinese and looks just like google SE.I had tried to submit my domain and still waiting to get it approved by them.
Besides the big guns, the engines being used are: Alta Vista, Ask, AOL, Hakia just to name a few. There are many more and the list could go on.