KiCAD CD4017 Simulation model (ngSpice LTSpice Spice)
Schematic circuit editor for VLSI and Mixed mode circuit simulation.
Solves symbolic electrical AC circuit equations
ePnR is an IC block standard cell placement & routing tool
Maxima Script to Calculate Transfer Function of a LTspice Circuit
Optimer: a SPICE base electrical/ electronic circuit optimization tool
Call SPICE from Mathematica to enable advanced circuit optimization
ECEbuntu - a customized operating system designed for ECE
Circuit simulators like SPICE for low memory computers
Substituting TABLE based limiting with tanh functions in SPICE models