A free application created in JavaScript that implements a calculator online to make scientific calculations. The site I am talking about is called Web2.0Calc, and I must say, it is a nice calculator, no bugs or errors in calculation, and is accurate to 32 decimal places.

This application can be very useful to those who often uses a calculator to solve problems for which they need to perform complex mathematical calculations such as trigonometric functions, and will have access to any device that can connect to the internet, like a NetBook, an iPhone, or any other generation mobile, you can always have it with you.