qucs: Qucs (A GUI based on Qt for setting up electronical circuits)
qucs:
qucs: Qucs provides a simulator, which is able to simulate the small- and
qucs: large signal and noise behaviour of microwave circuits. The results
qucs: can be shown  on  a  special presentation page in different formats
qucs: (rect, polar, smith,tabular).
qucs:
qucs:                     http://kde-apps.org/ 
qucs:                         WWW.SLACKY.IT
qucs:
qucs: PackaGer Gohanz.