Qucs-S (opens in new tab)

Quite universal circuit simulator with SPICE Qucs-S provides a fancy graphical user interface for a number of popular circuit simulation engines. Qucs-S contains instruments for schematic capture, visualization and provides differents passive and active components including device library. Additional information:Developer: Vadim KuznetsovLicense: GPL-2.0-or-laterVersion: 26.1.1