MoNooN3DR is the simple software that draws and shows the graph of the 3-dimensional mathematical functions in rectangular coordinates. If you input equations, choose colors, and choose resolution, you can see the graph. MoNooN3DR enables you to modify the graph color, graph resolution, background color(black and white).And through the option dialog box, you are able to modify the ranges and steps. Also you can view the window in full-screen mode, print the ghaph, and save as bitmap file.