OilProp is designed to assess the core thermalphysic properties of oil and its derivatives necessary to solve transportation and processing tasks, with the minimum volume of input data.

The "xyExtract" software is used for to extract data from a 2D graph (orthogonal and nonorthogonal axes) contained in a graphic file (scanned, PDF document or in a some file like gif, jpg, etc). The graphic file must be saved in a bitmap file.

A program to search for eclipses (lunar, solar, total, annual and umbral), to calculate the phase of the Moon at any given date and time and to convert between dates in the Gregorian and Julian calendars and dates in various lunar calendars.

Curve fitting (fit), nonlinear regression, treatment of data, basic statistics, error propagation, 2D and 3D graphs, confidence band, uncertainty, error bars, extrapolation, chi-square, correlation coefficient tests, covariance matrix, math tools.

SurGe is a computer program which enables to generate a surface as an interpolation (approximation) function of two independent variables. Implements an interpolation / approximation method called ABOS.

A program to convert between dates in various Chinese calendars and dates in the Gregorian and Julian calendars, and to find lunar new year`s day and leap months for any year.

Curve fitting (fit), nonlinear regression, treatment of data, basic statistics, error propagation, 2D and 3D graphs, confidence band, uncertainty, error bars, extrapolation, chi-square, correlation coefficient tests, covariance matrix, math tools.

Chemistry teaching software which simulates the bonding of covalent compounds on screen. Learn how covalent compounds are formed by atoms sharing electrons. Includes a reference section to support students learning with basic facts and information.

Chemistry teaching software which simulates the bonding of Ionic compounds on screen. Learn how Ionic compounds are formed by atoms gaining and losing electrons. Includes a reference section to support students learning.

Chemistry teaching software which simulates the building of any of the first 20 atoms (up to calcium) on screen. Learn how atoms are formed from electrons, protons and neutrons and how the electrons are arranged in shells or energy levels.