29+ Electronic Circuit Simulator Portable Pics. Qucs is a circuit simulator with graphical user interface. Electronic circuit simulators distributed under a free software license are available from several sources and for several computing platforms.
Electronic circuit simulation software partsim is an electronic circuit simulator online.
Here is a really cool open source circuit simulator built in java. The most popular alternative is qucs, which is both free and open source. The simple circuit simulator listed here let you carry out only one type of circuit design and simulation, while the advanced ones can carry. This is an electronic circuit simulator.