The revolution in internet computations. Originally claimed as The Computational Engine rather than conventional text and image search engines, Wolframalpha is a mathematical, trignometrical, analytical, geometrical and a lot of engines combined together to perform a powerful computation in few milliseconds to produce even graphical results.
Its a boon to engineering students and mathematical learners to verify their equations and graphs.
Even the third world countries can make use of it to teach their children effectively and efficiently.
Just have a look at it.