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Zuula
Description: Zuula features customizable multi-search tabbed interface for the major search engines. Offers web, image, video, news, blog, and job search.

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Search Engine Colossus
Description: With Search Engine Colossus, Explore 314 countries and territories! Search in other languages! Make submissions to search engines! Since 1998.

DuckDuckGo
DuckDuckGo

Description: DuckDuckGo – First up is a useful alternative search engine that doesn’t track your activity. Unlike Google and other popular search engines, DuckDuckGo protects your privacy by never finding out who you are, so you can freely search whatever you want. No more worrying about being monitored while searching for… sensitive things! Would you leave Google for the sake of your privacy?

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Quora
Description: Quora - You know how you often end up asking Google questions (“Who am I?” anyone?!)… Well Quora is basically a search engine just for asking questions and getting the answers! Literally any question you have probably has an answer on Quora, and if it doesn’t yet, simply ask it, and wait to see who answers. The best answers get voted up and become more visible too, so it’s a great way to learn new information.

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Wolfram Alpha

Description: Wolfram Alpha – Normal search engines like Google bring up a list of links to pages from around the web that relate to your search terms. Wolfram Alpha is a “computational knowledge engine”: it uses built-in knowledge curated by human experts to compute on the fly a specific answer and analysis for every query. So in other words, Wolfram Alpha is a massive – and growing – super computer that actually has all the answers to your questions ready!