Schematic circuit editor for VLSI and Mixed mode circuit simulation.
KiCAD CD4017 Simulating model (ngSpice LTSpice Spice)
Solves symbolic electrical AC circuit equations
Maxima Script to Calculate Transfer Function of a LTspice Circuit
ePnR is an IC block standard cell placement & routing tool
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