Leibnitz is the calculator you've always wanted (even if you didn't know it!), short of handwriting recognition.
FAQ: https://github.com/jafl/leibnitz/blob/main/README.md
ChangeLog: http://leibnitz.sourceforge.net/ChangeLog.html
A program developed by a 14 years old that uses the Pythagoras law to define if a triangle has a right angle or not. To get the latest updates on your facebook home page, Please like http://bit.ly/TanjoodoMadeSoftware