Qucs is a circuit simulator with graphical user interface. The software aims to support all kinds of circuit simulation types, e.g. DC, AC, S-parameter, Harmonic Balance analysis, noise analysis, etc.
Until now there is no or little user documentation available. The Qucs application has an integrated help system giving the user useful but yet. Freeware download of Qucs 0.0.16, size 6.29 Mb.
