NumWorks - The graphing calculator that makes learning math easier.

Numi App - Numi is a beautiful text calculator for Mac.

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

Parsify Desktop - Extendable calculator for the 21st century ⚡

eMathHelp.net - Site is created to help people learn math. Includes algebra, calculus, differential equation calculators and notes with many examples.

Soulver - Soulver is a software application that functions as a calculator that allows you type a continuous stream of information rather than having to input data into multiple cells.