ViPEC is an network analyser for electrical networks. It takes a schematic description of an electrical network, and performs a simulation of the circuit response in the frequency domain. Output is in the form of port parameters (S, Y and Z).
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.