GeoGebra CAS Calculator - Free online algebra calculator from GeoGebra: solve equations, expand and factor expressions, find derivatives and integrals

kSar : a sar grapher - ksar is a sar graphing tool that can graph for now linux,mac and solaris sar output.

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

Functy - A 3D graph drawing package that generates immediate results.

Microsoft Power BI - BI visualization and reporting for desktop, web or mobile

GNU Octave - GNU Octave is a programming language for scientific computing.