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Giac/Xcas - Free computer algebra system
GeoGebra CAS Calculator - Free online algebra calculator from GeoGebra: solve equations, expand and factor expressions, find derivatives and integrals
Dr. Geo - Dr. Geo, a software to design & manipulate interactive geometric sketches.
Geometry Pad - Geometry Pad is a dynamic geometry application for iPad and Android tablets.
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
Lybniz - Lybniz is a simple and very easy to use mathematical function graph plotter written in Python and...