ng-spice: Ngspice (circuit simulator)
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ng-spice: Ngspice is a mixed-level/mixed-signal circuit simulator.  Its
ng-spice: code is based on three open source software packages:  Spice3f5,
ng-spice: Cider1b1 and Xspice.  Ngspice is part of gEDA project, a full
ng-spice: GPL'd suite of Electronic Design Automation tools.
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