ngspice

• http://ngspice.sourceforge.net/

• http://eee.guc.edu.eg/Courses/Electronics/ELCT503%20Semiconductors/Lab/spicehowto.pdf

• http://ngspice.sourceforge.net/ngspice-tutorial.html

ngspice is the open source spice simulator for electric and electronic circuits.

Debian install

• sudo apt install ngspice