Sketch - Professional digital design for Mac.
GeoGebra CAS Calculator - Free online algebra calculator from GeoGebra: solve equations, expand and factor expressions, find derivatives and integrals
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
Affinity Designer - Professional creative software, exclusively for Mac.
GeoGebra - GeoGebra is free and multi-platform dynamic mathematics software for learning and teaching.