PSS®NETOMAC is a software tool by Siemens AG, capable of conducting digital power-system dynamic simulation of arbitrary power-system model. In our opinion, due to its extreme-level flexibility, it is most valuable tool for research purposes in the field of power system dynamics. Being able to achieve high calculation speeds for large systems makes it suitable for industrial projects as well. PSS®NETOMAC is a part of a family of modular software packages PSS®SINCAL, but it should be stressed due to its importance in our every-days’ work.