Fityk 1.2.9 Description:
Fityk is an open source app for nonlinear fitting of analytical functions (especially peak-shaped) to data (usually experimental data). Fityk is specialized in fitting peaks (bell-shaped functions like Gaussian, Loretzian, Pearson 7, Voigt) to experimental data. There are also people using it to remove the baseline from data, or to display data only. Fityk is reportedly used in crystallography, chromatography, photoluminescence and photoelectron spectroscopy, infrared and Raman spectroscopy, to name but a few.