Well, i always liked google the best = )
Did you guys know that its a Dictionary and a Calculator and much more...
I just learned about this recently
For example, type Define Hacker
At the top, you will have a definition (and a nice one)
Type 5+5 or some calculation... http://www.google.ca/help/features.html
(all the features)
Just learned all these features were on Google.
Very Powerfull tool if you ask me = )
What you guys think ?