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FreeImage is a library project for developers who would like to support popular graphics image formats (PNG, JPEG, TIFF, BMP and others). Some highlights are: extremely simple in use, not limited to the local PC (unique FreeImageIO) and Plugin driven!
Geodesy based library (geodetic and geocentric functions)
geoStarsLib has functions for dealing with many geodesy-based problems found in positioning, pointing, and surveying situations. It is useful to determine absolute position on the earth, pointing vectors, coordinate transformations, and other functions.
Calculate the number of theoretical trays with McCabe-Thiele method
Use the McCabe-Thiele method to calculate the number of theoretical trays in a distillation column operated under the conditions specified.
It has tools for data analysis to obtain empirical or semi-empirical equilibrium models. You can even use cubic splines.
This project uses icons of "Open Icon Library"
https://sourceforge.net/projects/openiconlibrary/