http://www.wolframalpha.com/
This thing is pretty cool. From the site description: "Answer questions, do math, instantly get facts, create plots, calculators, unit conversions, scientific data and statistics, help with homeworkâand much more." Check out their examples page: http://www.wolframalpha.com/examples/ -- it's prettymuch exclusively academic, as well as useful and interesting.
It's not just a search engine like Google. Instead, it helps you do concrete things. It's pretty cool, in terms of being a new form of information media. Give it a try, enter in anything like your hometown, a math problem, a scientific equation, a rare animal, etc.
For instance, I typed in "flying spaghetti monster", and here's what it looks like:
(https://www.happyatheistforum.com/forum/proxy.php?request=http%3A%2F%2Fi39.tinypic.com%2F27wt3bk.jpg&hash=66604aaef07e7f908a7a18bdccd4655cb5d1447c)
Awesome! :D
I'd heard of this but not used it until now. Just had a ten minit play and I'll be using it in future. Good link ;D
You can add Wolfram Alpha as a search engine on Fire Fox.
I use Wolfram Mathematica for maths-related stuff.