Wolfram Alpha

Though this is a fairly new start-up, its has risen in popularity in the past few months. It’s a new type of search engine that provides systematic knowledge immediately on an enormous scale of subjects. It’s not like your average Google or Yahoo because you can’t just type in for example:what year did the Yankee’s win the world series? But what you can enter is dates,topics(ex:historical events),math equations,science topics etc…
I’ts like the Wikipedia thats always 100% accurate.

This is a great tool for students because of the 10+ trillion topics available and because of the mathematics and science capabilities that Google can’t even begin to compete with. If your a Star Trek fan, think of it as asking your question to Spock and getting back a 100% logical and accurate answer every time.

You can visit them here

PC World also has some cool information here