The software CYME is developed by Eaton and distributed by Powersys in France.
CYME Power Engineering software is a suite of applications for distribution, transmission and industrial power systems analysis.
It is composed of a network editor, analysis modules and user-customizable model libraries from which you can choose to get the most powerful solution. Modules available allow load-flow, short-circuit, harmonics, transient stability, voltage stability analysis as well as protective device coordination, cable ampacity calculations, substation grounding. Powersys is the exclusive distributor in Europe.