Advanced Grapher is an award-winning graphing software. You can use it to plot graphs of equations, inequalities, and tables. The program also allows you to perform regression analysis (curve fitting) and such calculations as obtaining zeroes and extrema of functions, intersections, numerical integration, and more. You can read about features of the product, view the screen shot, the graphs gallery (several interesting graphs plotted with Advanced Grapher), download the fully functional 30-day trial version of Advanced Grapher and purchase it if you like the program and wish to use it after the evaluation period.  works under Windows 95/98/Me/NT/2000/XP/2003/Vista/2008 operating system (or higher);
multiple-document interface; plotting of up to 100 graphs on one coordinate plane (in one document); supports graphing of the following graph types:
 Y(x) and X(y);
graphs of tables;
R(a) - in polar coordinates;
X(t) and Y(t) - parametrical equations;
f(x,y)=0 - graphs of equations;
f(x,y)<0 and f(x,y)>0 - graphs of inequalities (and systems of inequalities);
dx/dy(x,y) and dy/dx(x,y) - slope fields. you can specify color, style and width of lines, style and size of points, plotting by lines or points (or both), style of shading (for inequalities) for each graph. You can also change additional properties of graphs depending on graph type (e.g. amount of plotting points, plotting intervals, sorting (for tables), etc). lots of design parameters of a coordinate plane (parameters of axes, grid, background, legend); you can place custom text labels on the coordinate plane; calculus features:
regression analysis (7 regression types and ability to automatically choose a regression type);
obtaining intersections;
analytical derivation;
determination of the equation of a tangent and its plotting;
numerical integration;
obtaining zeroes and extrema of functions;
built-in calculator you can copy graphs as BMP or EMF to export them to the Word documents and save graphs as GIF, BMP or EMF; multilingual interface. English, German, Italian, French, Spanish, Portuguese, Dutch, and Russian support is included in distribution package of Advanced Grapher. You can also download additional language files for other languages. | 
