Download of CurvFit 6.501 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. CurvFit.exe is the most common filename for this program's installer. CurvFit relates to Education Tools. The actual developer of the free program is Optimal Designs Enterprise. The most popular versions of the software 6.3, 6.2 and 6.1.
From the developer:
CurvFit (tm) is a nonlinear curve fitting program. Sine, damped Sine, Lorentz, Modified Lorentz, Power (ie Polynomial) and Exponential series are presently available models to match your data. We strongly suggest trying a Lorentz series for data with multiple peaks or valleys. A calculator exists for interpolation &/or extrapolation of given data. CurvFit has proven excellent for hard to fit data.
You may want to check out more software, such as ExamForce Engine Installation CM, Musical Scales or Touch-Typing, which might be similar to CurvFit.