OriginPro, GnuPlot, python(x,y), Grapher, SciDaVis, GraphSketcher, MagicPlot, Aveloy Graph, MathMod, KSEG, Matplotlib, GeoGebra Graphing Calculator, Lybniz, Autograph, MagicPlot Viewer, Functy, Apollonius are some alternatives to GeoGebra CAS Calculator.