Mathematical Applets - Draw a graph y = f(x) or fractal, seek prime numbers or solve the Diophantine Equation.

Advanced Grapher - Graphing, curve fitting and calculating software. Plot high-quality 2D graphs of equations, inequalities and tables. You can also perform regression analysis and various calculations.

GrafEq - Program for graphing implicit relations. Designed for high school use, Windows and Mac evaluation versions available for download.

HandyGraph - Provides a convenient method to create and edit grids, blank graphs, and number lines within Microsoft Word. Free downloadable demo, Windows and Mac versions available.

WestSide - Series of charting programs for processing numeric data to produce graphs. Supports two and three-dimensional graphing and contour plotting.

DataFit - Curve fitting and data plotting software. Accuracy of nonlinear regression results verified with NIST.

CurvusPro - Macintosh equation-plotting software supporting both 2D and 3D graphs. Supports implicit functions, differential equation solutions, and vector fields.

3D Grapher - Windows software for plotting animated 2D and 3D equation and table-based graphs. An unlimited number of graphs can be plotted using different colors and lighting.

Pacific Tech Graphing Calculator - Symbolic and numeric methods for visualizing two and three dimensional mathematical objects. Supports differential equations and integration. Available for Macintosh and Windows.

Gus and Gertie's Graphin' Gadget - Easy-to-use graphing package supporting Cartesian, parametric, and polar graphs. Many graph attributes can be customized, including color, line thickness, and zoom level.

Graphmatica - Equation plotter featuring symbolic differentiation and tangent lines. Graphs can be printed, copied to the clipboard, and saved as BMP or WMF files. Shareware.

IGOR Pro - An interactive environment for experimentation with scientific and engineering data and for the production of publication-quality graphs and page layouts using Macintosh and Windows computers.

Plane Graphic Calculator - Java applet that can interactively plot the graph of mathematical functions. Handles complex numbers, vectors, and parametric equations.

MathGV - Mathematical function graphing software program for Windows. It can plot 2 dimensional, polar, and 3 dimension functions. Freeware.

DPGraph 2000 - Powerful mathematical visualization program supporting graphs in up to seven dimensions. Coded entirely in assembly language for optimized speed.

Graph Paper - Simple Windows freeware program for plotting graphs of functions. Supports algebraic, trigonometric, and hyperbolic functions.

Autograph - PC software for teaching calculus, coordinate geometry, statistics and probability.

Andrew Harmsworth's Graph Software Contest - A look at some useful graph drawing software.

PrestoPlot - A freely available, interactive, 2D plotting tool for Win32 platforms. Featuring LaTeX text editor, plot animation and an API for plotting data from both console and windows based applications.

GraphPad Prism - Combination of basic biostatistics, curve fitting and scientific graphing in one program. Available for Windows or Macintosh.

CurvFit - A curvefitting program; Power, Exponential, and Lorentzian series are available math models. Learn to 'read' eigen-values of the Jacobian and Hessian matrices.

Coypu - Plots Cartesian, polar and parametric functions. Produces scattergrams and simple line graphs from data files.

GraphSight (Cradle Fields, Inc.) - GraphSight is the most convenient graphing tool to plot and explore 2D math functions. It gives you a full control over a coordinate space through interactivity of all the graphic objects on the plot.

Java Equation Grapher - This is an easy to use equation grapher programmed in Java. Find roots and intersections easily.

DPlot - General purpose plotting program designed for scientists, engineers, and students. It features multiple scaling types, as well as several special purpose plots: tripartite grids (shock spectra), grain size distribution plots, polar plots, and contour plots of 3D data. Manipulation functions include FFT, filtering, smoothing. Data can be input via file, copied from the clipboard, sent to DPlot from another program via dynamic data exchange, or generated by formula. Example code for writing plugin modules for file import and data manipulation is provided.

FNGraph - Graphing and analyzing mathematical functions. Graphs and coordinate system customization, several graphs in a document, shell integration. Supports basic arithmetic operators and a large variety of functions. Contains tools for function evaluation, analysis and integration.

Graph++ - Graphing application that allows users to effortlessly evaluate equations and mathematical functions graphically. It allows data to be copied and pasted into various applications (MS Excel, etc.). Graphs can be exported as image files, or copied and pasted as images directly into other applications. Graph ++ can evaluate equations producing data sets with 500,000+ elements.

Maym Software - GraphBuilder Software.

Online Curve and Surface Fitting - Curve and surface fit 2D and 3D data online with a rich set of error histograms, error plots, curve plots, surface plots, and contour plots.