Imtec Graf Studio 2007Free
The program is designed to graph mathematical functions. The main benefits are the minimum size and ease of operation. Unlike most programs of this class, where you need to know special syntax input mathematical functions, you can write functions in much the same way as you do normally on paper.
The program includes Editor-2D-graphs (in the three coordinate systems);
Editor of 3D-graphs (which, incidentally, does not require you support Direct3D, OpenGL or something else!);Master of research functions (the point of maximum / minimum on the interval, and displays the schedule for the derivative); calculator (handy calculator with unlimited memory!)