PCB Artist is described as 'Printed Circuit Board Design Made Easy: Professional-Grade PCB Design Software with Free Live Technical Support. PCB Artist Includes Features Such as Multi-Page Schematics and Netlist Import' and is an app in the Education & Reference category. There are more than 25 alternatives to PCB Artist for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and Android. The best alternative is KiCad, which is both free and Open Source. Other great apps like PCB Artist are Fritzing (Paid, Open Source), QUCS (Free, Open Source), LibrePCB (Free, Open Source) and LTspice (Free).
The Quite Universal Circuit Simulator (QUCS) is an integrated circuit simulator allowing the simulation and graphical presentation of results of large-signal, small-signal and noise behavior in circuits.
The gEDA project has produced and continues working on a full GPL'd suite and toolkit of Electronic Design Automation tools. These tools are used for electrical circuit design, schematic capture, simulation, prototyping, and production.
KTechLab is an IDE for microcontrollers and electronics. It supports circuit simulation, program development for microcontrollers and simulating the programmed microcontroller together with its application circuit.