NumWorks - The graphing calculator that makes learning math easier.

Rule of 3 Calculator - Apply the mathematical Rule of Three in an easier, faster and more practical way!

WolframAlpha - WolframAlpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.

PCalc - PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody...

Photomath - Photomath is a mobile app that will give you the ability to test your equations through a simple calculator interface that will fully explain the solution in a step-by-step fashion. Read more about Photomath.

Sellertour PayPal fee Calculator - PayPal Fee Calculator is a simple and effective free tool that allows you to calculate your PayPal...