Function Grapher 3.5.5 is a Graphing Software product from graphnow.com, To create 2D, 2.5D, 3D function graphs, animations and table graphs. 2D Features: equation and inequality; Cartesian and polar coordinate systems; curve and animation; graph of inverse function and derivative function; parity; extremum, and inflexion; integration; root; arc length; tangent and normal; curvature circle; intersection; line plot; scatter plot; stem plot; step plot; curve smoothing. 3D Features: cartesian, cylindrical, and spherical coordinate systems; 3D curve and surface; animation; 3D surface based on table data. Ability to create color map, contour plot and vector plot. Ability to save graphs as pgp file or bmp file. Ability to save animation as AVI file. The license of this design software is Free Trial Software, the price is $39.95, you can free download and get a free trial before you buy. If you want to get a full or nolimited version of Function Grapher, you can buy this design software.