Graphy3D

Graphy 3D is the spiritual successor to the wildly popular <a rel="nofollow" href="https://marketplace.firefox.com/app/graphy">Graphy 2D function plotter</a>. Graphy3D raises the bar by literally adding another dimension! Explore Cartesian surfaces, parametric curves, parametric surfaces, cylindrical surfaces, and spherical surfaces in full 3D. It even includes the ability to rotate your 3D plots so you can better understand how they actually look. Best part, its completely free! Note: The full functions for some of the graphs in the screenshots cannot be seen, however, there are some sample functions provided on the help page of Graphy3D and lots more if you do an Internet search.