Calculate: Perform basic calculations such as addition, subtraction, multiplication, and division in mathematics.

Currency Converter: Convert currency values between countries: US, EU, British Pound, Japan, Canada, Australia, Singapore, Hong Kong, New Zealand, Swiss Franc, Chinese, Indian, Brazil, South African Rand, Russia, Indonesia, Saudi Riyal .

Length Converter: Convert length between the following units: Nanometer, Micrometer, Millimeter, Centimeter, Meter, Kilometer, Inch, Foot, Yard.