Web 2.0 has done many wonders already, as it is not limited to web pages but has evolved into quite useful web applications. Online Scientific Calculator is one of them, which does all the normal functions of an advanced scientific calculator.
It is a free online application, requiring no fee at all and brings lot of new features like automatically plotting graphs. Its functions range from standard scientific calculator functions to graphs and equations, from trigonometry to matrices and number theory, this baby does it all and all that for free.
It is like more advanced form of scientific calculator and is online, so next time when you lost your scientific calculator, you may not have to buy it, as Online Scientific Calculator is there for you.