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» 3D Grapher 
Plotting and data visualization programming for graphing and animating 2D and 3D equations and table charts. Allows some customization.
http://www.romanlab.com/3dg/
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» 3DMath Explorer
Plots 2D and 3D graphs of mathematical functions and curves. Windows; 30-day limited trial version.
http://www.teber.biz
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» ACE/gr
A 2D plotting tool for X Window System, with ports to other systems available. Also known as xmgr, this software is now superseded by Grace.
http://plasma-gate.weizmann.ac.il/Xmgr/
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» Aabel
Statistical and Graphing Software for Mac OS X. Site provides screenshots and features list, together with pricing details and online ordering facility.
http://www.gigawiz.com/
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» Analysis
Open source (GPL) windows software that can plot 2D and 3D graphs of functions. Includes description of features and screenshots.
http://www.geocities.com/leibowitz.geo/analysis_en.html
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» Analyzer
Function plotting program for windows. Site gives features list, screenshots, and allows download of a shareware version.
http://www.freeweb.hu/gmg/
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» Arnab's Graph Explorer
Simple Windows freeware program for plotting and interactively exploring graphs of mathematical functions. Supports algebraic, trigonometric, and hyperbolic, and user defined functions.
http://www.geocities.com/hirak_99/goodies/graph.html
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» Autograph
PC software for teaching calculus, coordinate geometry, statistics and probability.
http://www.autograph-math.com/
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» Cradle Fields
A programming tool to plot and explore two dimensional math functions, such as cartesian y(x) and x(y) graphs, parametric and polar ones. Allows the user to have control over a coordinate space through interactivity of all the components of the graph.
http://www.cradlefields.com/
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» Create a Graph
Web-based graphing tool for producing bar, line, pie, and area charts from small sets of discrete data.
http://nces.ed.gov/nceskids/createagraph/
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» CurvFit
A curvefitting program with Lorentzian, Power, Exponential, and Sine fitting models. Free download of windows executable.
http://digitalcalculus.com/site/1523506/product/Fit-5
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» CurvusPro
Macintosh equation-plotting software supporting both 2D and 3D graphs. Supports implicit functions, differential equation solutions, and vector fields.
http://www.curvuspro.ch/
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» DPGraph
Visualization program supporting graphs in up to eight dimensions. Coded entirely in assembly language for optimized speed.
http://www.dpgraph.com/
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» DPlot
General purpose plotting program. It features multiple scaling types, several special purpose plots: tripartite grids, grain size distribution plots, polar plots, and contour plots of 3D data. Manipulation functions include FFT, filtering, smoothing.
http://www.dplot.com/
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» DataFit
Curve fitting and data plotting software. Accuracy of nonlinear regression results verified with NIST.
http://www.oakdaleengr.com/
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» DeadLine
Free windows software performing graph plotting and root-finding for algebraic functions. Features list and tutorial.
http://deadline.3x.ro
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» Digitize It
Shareware that automatically pulls in numerical data from scanned graphs and transferred to a specified axes system. Can be saved in ASCII format, ready to use in other applications. Is able to import files from most image formats (gif, png, tiff,bmp). Ru
http://www.digitizeit.de/
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» Dr. Hanley's Science Graphs
Software for graphing equations and data. Supports multiple curves as well as parametric graphs. Plus version can graph multi-color contour lines.
http://www.hanleyinnovations.com/sgraph.html
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» Equation Grapher
Function graphing software for windows, aimed at high-school pupils. Purchase online.
http://www.hanleylearning.com/
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» FN Graph
Plotting program includes a customizable coordinate system, several graphs in a document, and shell integration. Supports basic arithmetic operators and a variety of other formulas. Contains tools for function evaluation, analysis and integration.
http://old.ournet.md/~fngraph/
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» FitAll
General purpose nonlinear regression analysis (curve fitting) tool from MTR Software. Windows. Free download of evaluation version.
http://www.fitall.com/
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» FooPlot
Online 2D and 3D plotter with root and intersection finding, easy scrolling, and exporting features.
http://fooplot.com/
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» GLgraph
An OpenGL based function grapher for Linux, handling 3 unknowns (x,z,t) and producing a 4D function with 3 space and 1 time dimension. Free under GPL.
http://glgraph.kaosu.ch
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» GUIPlot
Creates X-Y data plots and histogram charts. Includes free demo download.
http://www.guiplot.com/
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» GetData Graph Digitizer
Allows the user to digitize a scanned graph and save the results in ASCII file or export to formats of other applications. Windows; 21-day free trial.
http://getdata-graph-digitizer.com/
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» Grace
A WYSIWYG 2D plotting tool for the X Window System and M*tif. Ports to other systems (including windows) are also available. Features overview, full documentation, and downloads.
http://plasma-gate.weizmann.ac.il/Grace/
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» GrafEq
Program for graphing implicit relations. Designed for high school use, Windows and Mac evaluation versions available for download.
http://www.peda.com/grafeq/
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» GraphPad Prism
Combination of basic biostatistics, curve fitting and scientific graphing in one program. Available for Windows or Macintosh.
http://www.graphpad.com/prism/Prism.htm
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» Graphis
Graphing and visualization program for 2D and 3D data. Description of features, gallery of plots, and free demo version to download. [Windows]
http://www.kylebank.com/
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» 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.
http://www8.pair.com/ksoft/
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» Gus and Gertie's Graphin' Gadget
Commercial package supporting Cartesian, parametric, and polar graphs. Many graph attributes can be customized, including color, line thickness, and zoom level.
http://www.somewareinvt.com/Someware_in_Vermont/Gus_and_Gertie/gusandgertie.htm
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» HandyGraph
Software that plots functions, points, inequalities, and makes blank graph templates. Commercial software for Windows, with free fully-functional 30-day trial.
http://www.handygraph.com/
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» 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.
http://www.wavemetrics.com/
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» Jpowered.com Bar Graphs
Creates two and three dimensional vertical bar, horizontal and stacked charts from files, databases scripts and server side processes. Lists features. Includes examples and free download demo.
http://www.jpowered.com/bar_graph/
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» KaleidaGraph
Software for graphing and data analysis. Windows, MacOS. Purchase on-line or download free trial version.
http://www.synergy.com/
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» MathGV
Mathematical function graphing software program for Windows. It can plot 2 dimensional, polar, and 3 dimension functions. Freeware.
http://www.mathgv.com/
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» MathGrapher
Mathematical graphing tool for 2D and 3D functions and data. Also includes statistical tools, nonlinear curve fitting, integration of coupled ordinary differential equations, and cellular automata.
http://www.mathgrapher.com/
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» MoNooN Grapher
A collection of graphing programs, for plotting functions in 2D and 3D, rectanguluar and polar coordinates. [Windows shareware]
http://www.monoon.com/
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» MultyGraphiX
Generate 2D and 3D plots of explicit and parametric functions, in various coordinate systems. Site provides screenshots, features list, and alows download of an evaluation copy.
http://multygraphix.gracebyte.com/
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» PGPLOT Graphics Subroutine Library
The PGPLOT Graphics Subroutine Library is a Fortran- or C-callable, device-independent graphics package for making simple scientific graphs.
http://www.astro.caltech.edu/~tjp/pgplot/
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» 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.
http://www.pacifict.com/
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» Plane Graphic Calculator
Java applet that can interactively plot the graph of mathematical functions. Handles complex numbers, vectors, and parametric equations.
http://www.accesscom.com/~lillge/pgc
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» Plot 3D
2D and 3D function graphing. Includes freeware download, and a gallery of output. [Windows 98-XP]
http://www.plot3d.net/
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» Ploticus Data Display Engine
An alternative to gnuplot, GPL, command-line, with various style options. Program can plot date, time, and category data directly. [Unix/Win32]
http://ploticus.sourceforge.net/
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» Quisoft's Visualizer
Web-based application for producing graphs of mathematical functions. [may not work in all browsers]
http://www.quisoft.com/
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» RJS Graph
Produces scientific and mathematical graphs, and provides a range of data analyzing tools (including regression lines) with graph export facilities. [Windows freeware]
http://www.rjsweb.fsnet.co.uk/graph/
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» Rt-Plot
A tool to generate Cartesian X/Y-plots from scientific data. View the changing graphs, including linear and non linear regression, interpolation, differentiation and integration, during entering.(Shareware)
http://www.rt-science.de/rt-plot.html
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» VisuMap
A non-linear visualization program for dimensional data. It converts table of data to 2D/3D maps by combining multidimensional scaling and clustering methods.
http://www.visumap.net/
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» WestSide
Series of charting programs for processing numeric data to produce graphs. Supports two and three-dimensional graphing and contour plotting.
http://hp.vector.co.jp/authors/VA010465/
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» plotutils
A GNU package for producing 2D plots in a variety of formats, built around an enhanced libplot C/C++ function library. Site provides links to documentation and other related software.
http://www.gnu.org/software/plotutils/
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