LTspice is described as «IV is a high performance Spice III simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators» and is a circuit simulator in the education & reference category. There are more than 25 alternatives to LTspice for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and Android. The best alternative is Circuit JS, which is both free and Open Source. Other great apps like LTspice are QUCS, OpenModelica, Xcos and iCircuit.LTspice alternatives are mainly Circuit Simulators but may also be Electronic Design Automation Tools or CAD Software. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of LTspice.
