GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.

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

GeoGebra - GeoGebra is free and multi-platform dynamic mathematics software for learning and teaching.

SpeedCrunch - SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .

Matplotlib - matplotlib is a python 2D plotting library which produces publication quality figures in a variety...

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