iCircuit Alternatives

Animated electronic circuit simulator using ideal components to visualize voltage and current.

Qucs, briefly for Quite Universal Circuit Simulator, is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit.

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It is a circuit simulator on a virtual breadboard.

LTspice® is a high performance SPICE simulation software, schematic capture and waveform viewer with enhancements and models for easing the simulation of analog circuits.

OpenModelica – A Free Modelica Environment!

Spectrum Software makes the Micro-Cap SPICE simulator, a SPICE and PSPICE® compatible SPICE software analog and digital circuit simulator for electronic design automation circuit simulation.

All about General Public License (GPL) and Electronic Design Automation (EDA) software tools

A Cross Platform and Open Source Electronics Design Automation Suite

PartSim is a free and full-featured SPICE circuit simulator that runs directly in your browser.

- Design circuits quickly and easily with a modern and intuitive user interface with drag-and-drop...

Fritzing is an open-source initiative to support designers, artists, researchers and hobbyists to...

OrCAD PSpice technology provides the best, high-performance circuit simulation to analyze and refine your circuits, components, and parameters before committing to layout and fabrication

Solve Elec is a free educational program to draw and analyze electrical circuits.