WolframAlpha: Computational Knowledge Engine

Are you downing in a sea of data? Do you need help with a computation? Are you stumped by a scientific term? Then you need to check out WolframAlpha.

 
WolframAlpha is more than just a search engine. It gives you access to the world's facts and data and calculates answers across a range of topics, including science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music, and more. WolframAlpha's long-term goal is to make all of the world's systematic knowledge immediately computable and accessible to everyone. Enjoy!