WolframAlpha - described as a computational knowledge engine. Enter your question or calculation,and WolframAlpha uses its built-in algorithms and a growing collection of data to compute the answer.
Google Squared is an experimental search tool that collects facts from the web and presents them in an organized collection, similar to a spreadsheet. If you search for [roller coasters], Google Squared builds a square with rows for each of several specific roller coasters and columns for corresponding facts, such as image, height and maximum speed.
Microsoft Bing - Bing makes an extra effort to help searchers with some targeted topics such as shopping, travel, local business and information, and health-related research which have been identified as areas in which people wanted more assistance from a search engine in making key decisions.
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