The EV.SAXSLAB.ORG outlines the evolution of a software package SAXSEV which was started from small cross-platform application with a graphical user interface for estimation of the particle volume fraction distribution function and fitting specific surface area to this distribution pattern and grew into a powerful and complex system for SAXS[Small Angle X-ray Scattering] analysis.

SAXSEV implements the method of statistical regularization for ill-posed mathematical tasks being solved with the use of Numpy, Scipy and MathPlotlib libraries. The main features of this software application are the ability to adjust the arguments grid of the desired function and the ability to select the optimal value of the regularization parameter. This parameter is selected by several specific and one common criteria. The software application consists of modules written in Python3.

Frst of all the modules were combined by common interface based on Tkinter library. It was used successfully at effectiveness study statistical regularization method for analyzing dispersed system by SAXS, at research of the powder consisting from nanoparticles and composite materials with nanoparticles inclusion.