RETScreen 4 is an Excel-based clean energy project analysis software tool that helps decision makers quickly and inexpensively determine the technical and financial viability of potential renewable energy, energy efficiency and cogeneration projects. (http://www.retscreen.net/ang/home.php)
HOMER: Energy Modeling Software for Hybrid Renewable Energy Systems, http://homerenergy.com/
ARCHICAD- build your green buildings, roofs and what you need in green innovation architecture (http://www.graphisoft.com/archicad/)
MATLAB: general purpose and advanced modelling and simulation of engineering-physico-chemical processes, http://www.mathworks.com
MATHCAD: as you write as you get answers, friendly and easy to use, standard for engineering calculations, http://www.ptc.com
COREL Draw
eQUEST –the QUick Energy Simulation Tool, http://www.doe2.com/
HYPERCHEM– molecular structures builder and analyzing properties www.hyper.com