This Software is a system to estimate the chemical properties of synthetic material. GAUSSIAN and GAMESS can be used in simulation programs such as PURIPOSUTO. MolWorks is an integrated software tool for molecular design. MolWorks supports a molecular builder and pre/post interface to quantum mechanics calculation software, such as Gaussian, MOPAC and GAMESS. MolWorks also estimates properties of the molecules.MolWorks is programed with Java language.