Curve Fitting Software

SimplexNumerica Dipl.-Phys.-Ing. Ralf Wirtz 

SimplexNumerica is an object-oriented numerical data analyzer, plot and presentation program. SimplexNumerica is proving to be extremely popular among scientists. Ergonomic programming using the newest Windows programming guidelines with toolbars, context dialogs and interactive diagrams providing easy handling with difficult numeric mathematics. . Freeware download of SimplexNumerica, size 17.84 Mb.


Kintecus 6.80 Ianni Consulting 

As of January 2018, the Kintecus simulation software has been cited over 300 peer reviewed high impact factor journals: SCIENCE, JACS, PNAS, J. Phys. Chem.A, NATURE, PCCP, J. Biol. Chem., Plas. Chem. Plas. Proc., Int. J. Chem. It is an Industrial Strength/Research Grade chemical modeling, chemical kinetics and equilibrium software for simulation . Free download of Kintecus 6.80, size 15.81 Mb.

Regression Analysis - DataFitting 1.7 Institute of Mathematics and Statistics 

DataFitting is a powerful statistical analysis program that performs linear and nonlinear regression analysis (i.e. curve fitting). DataFitting determines the values of parameters for an equation, whose form you specify, that cause the equation to best fit a set of data values. DataFitting can handle linear, polynomial, exponential, and general . Free download of Regression Analysis - DataFitting 1.7, size 2.00 Mb.

Regression Analysis - CurveFitter 4.5.6 Institute of Mathematics and Statistics 

CurveFitter program performs statistical regression analysis to estimate the values of parameters for linear, multivariate, polynomial, exponential and nonlinear functions. The regression analysis determines the values of the parameters that cause the function to best fit the observed data that you provide. This process is also called curve . Free download of Regression Analysis - CurveFitter 4.5.6, size 3.22 Mb.

Easy CurveFit 3.0 HAN 

"Easy CurveFit" is a very easy tool to fit curve. Only three steps you should do, and you'll get the fitting curve and the needed parameters. The models include linear and nonlinear.Regressions:

1. Linear Fit, y=a+bx;
2. Quadratic Fit, y=a+bx+cx^2;
3. Compound Fit, y=ab^x;
4. Logatithmic Fit, y=a+b*ln(x);

EASY-FIT ModelDesign 5.13 Klaus Schittkowski 

The system solves constrained nonlinear parameter estimation (nonlinear regression, data, curve and surface fitting) problems based on ODEs, DAEs, PDEs, PDAEs, steady-state systems, Laplace equations, and analytical functions.
A statistical analysis provides confidence intervals, correlation and covariance matrix, identification of significant . Free download of EASY-FIT ModelDesign 5.13, size 72.72 Mb.

CurvFit 6.210 Optimal Designs Enterprise 

CurvFit (tm) is a curve fitting program for Windows. Lorentzian, Sine, Exponential and Power series are available models to match your data. A Lorentzian series is highly recommended for real data especially for multiple peaked and/or valleys data.

CurvFit is another improved productivity example do to using Calculus (level) . Freeware download of CurvFit 6.210, size 7.63 Mb.

InterReg 1.3 Kroll Software-Development 

Interpolation and Regression are fundamental and important calculations in mathematics. Mr. Newton and Mr. Gauss were engaged in-depth with numerical solutions for these problems. Today, there are improved algorithms, that can solve such tasks.

InterReg allows you to do such complex calculations just with some point-and-click. So this . Free download of InterReg 1.3, size 2.32 Mb.

NCSS 7. 1. 2021 NCSS, LLC 

NCSS includes over 230 statistical procedures and plots. NCSS imports and exports all major spreadsheet, database, and statistical file formats. NCSS easily produces sharp, flexible graphics. NCSS output is easily transferred to popular word processors and presentation software such as PowerPoint. NCSS is fully-documented; all help manuals are . Free download of NCSS 7. 1. 2021, size 76.44 Mb.

Fityk 0.9.8 Marcin Wojdyr 

Fityk is user friendly, open source software for nonlinear curve fitting and data analysis. It is primarily used by scientists to analyze data from experiments (powder diffraction, chromatography, photoluminescence and infrared and Raman spectroscopy), but can be used to fit any analytical functions to any kind of data. The program allows data . Freeware download of Fityk 0.9.8, size 0 b.

Graphis 2. 9. 4400 Kylebank Software Ltd. 

Graphis 2D and 3D visualization software makes the generation of analytical curves effortless. For example, to plot sin(x), simply enter y = sin(x) in the curve definition window. The curve definition need not be a single line. It can consist of multiple lines consisting of constants, variables and expressions defining components of an overall . Free download of Graphis 2. 9. 4400, size 33.92 Mb.

CoPlot 6.400 CoHort Software 

CoPlot is an incredibly versatile program for making publication-quality 2D and 3D scientific graphs (which plot data and equations), maps, and technical drawings. Every aspect of CoPlot has been designed around one basic goal: to make a program that is so versatile that scientists and engineers can easily get exactly what they want. . Free download of CoPlot 6.400, size 33.77 Mb.

ReactLab EQUILIBRIA 1.0 Jplus Consulting 

Global analysis of multivariate spectrophotometric data to determine underlying reaction mechanisms together with all reaction parameters and intermediate spectra. Compatible measurements include UV-Vis, IR, Raman, NMR, ESR and CD. A compiled Matlab analysis kernel and graphical GUI which is extremely robust and easily maintained. A versatile Excel . Free download of ReactLab EQUILIBRIA 1.0, size 177.97 Mb.

AQUAlibrium 3 1 Flow Phase Inc. 

AQUAlibrium is a software package for systems containing water, hydrogen sulfide, carbon dioxide, and light hydrocarbons. It has a well-deserved reputation for being amongst the most accurate software for equilibrium calculations in these systems, especially for acid gas water systems.

Main features:
-New calculation routines

Trimill TriLookup 2 21 Trimill Industrial Systems Inc. 

TriLookup is an add-in for Microsoft® Excel for Windows versions 97, 2000, 2002 (XP), 2003, and 2007 and Excel for Macintosh versions 98, 2001, X and 2008. When installed, TriLookup adds eleven powerful lookup and interpolation worksheet functions to Excel, which offer greatly enhanced functionality compared to Excel's built-in lookup . Free download of Trimill TriLookup 2 21, size 1.07 Mb.

Pilot3D 1 20 New Wave Systems, Inc. 

Pilot3D is the lowest priced, full-featured, relational trimmed NURB curve and surface 3D modeling program on the market, with features not found in any other software, at any price. If you want complete shape control over your curves and surfaces, you need this easy-to-use program.

Let Pilot3D be your primary 3D modeling program or . Free download of Pilot3D 1 20, size 6.48 Mb.

FitAll 6 2 MTR Software 

FitAll is a general-purpose, nonlinear regression analysis (curve fitting) program that can be used to fit a set of experimental data to any of the defined functions (models). FitAll fits data to continuous, single-valued functions with the general form. Three different regression analysis methods can be used to obtain the best fit. . Free download of FitAll 6 2, size 0 b.

DataFitX 2.0 Oakdale Engineering 

DataFitX is a COM component (in-process ActiveX DLL) which allows you to add a powerful nonlinear regression (curve fitting) engine to your software with just a few simple lines of code. DataFitX is developed using COM, so it can be used in any environment that supports COM, including Microsoft Visual Basic, Microsoft Visual C++, Delphi and VBA . Freeware download of DataFitX 2.0, size 2.35 Mb.

CoStat 6.400 CoHort Software 

CoStat is an easy-to-use program for data manipulation and statistical analysis. CoStat is included with CoPlot.


- Use a spreadsheet with up to 1.5x10^8 cells (numbers).
CoStat's spreadsheets can contain different types of data (floating point, integer, date, time, degrees, text, etc.).
- Import . Free download of CoStat 6.400, size 4.22 Mb.

CurveExpert Basic 1 40 Daniel G. Hyams 

CurveExpert Basic is a comprehensive curve fitting system for Windows. XY data can be modelled using a toolbox of linear regression models, nonlinear regression models, interpolation, or splines.
Over 30 models are built-in, but custom regression models may also be defined by the user. Full-featured graphing capability allows thorough . Free download of CurveExpert Basic 1 40, size 1.15 Mb.