1)   CurvFit 5.12.4
A curve fitting program: Lorentzian, Sine, Exponential & Power series are available models to match your data. A Lorentzian series is recommended for real data especially for multiple peaked data. Another improved productivity example.
Curve fitting, data fitting, Math Modeling, Sine Series, Lorentzian Series, Exponential Series, Power Series, Equation Calculator, Calculus Programming,

 2)   Scientific calculator - ScienCalc 1.1
ScienCalc is a convenient and powerful scientific calculator. ScienCalc calculates mathematical expression. It supports the common arithmetic operations (+, -, *, /) and parentheses.
graphing, data analysis, plotting, curve fitting, nonlinear regression, non-linear regression, non linear regression, data fitting, non linear curve fitting, nonlinear curve fitting,

 3)   Regression Analysis - DataFitting 1.7
DataFitting is a powerful statistical analysis program that performs linear and nonlinear regression analysis (i.e. curve fitting).
DataFitting, curve, fitter, least squares, curve fitting, nonlinear, non-linear, regression, equation, curve fit,