'''Qucs''', the '''Quite Universal Circuit Simulator''', is a [[Free Software]] integrated schematic capture and simulation tool for digital and analog signals. It supports DC, transient, AC and digital simulations as well as parameter sweeping. It does not currently support Monte Carlo simulations, although with some crude Bash and [[QtOctave]] work, this can be overcome. If you don't mind using extra tools for Monte Carlo simulation and are willing to fudge the exact model of op-amps used in [[Lab-in-a-Box]] projects, Qucs and be used to complete assignments in [[ECE 2074 Electric Circuit Analysis Laboratory]].