Free Pspice AlternativesTop Circuit Simulators & Electronic Design Automation Tools like Pspice

This is a javascript electronic circuit simulator. When the applet starts up you will see an animated schematic of a simple LRC circuit. The green color indicates positive voltage. The gray color indicates ground. A red color indicates negative voltage.

LTspice IV is a high performance Spice III simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators.

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.

EasyEDA - Web-based and desktop EDA suite; runs in browser, Windows, Mac, or Linux. Schematic capture, Ngspice based simulation, PCB layout, custom PCB manufacturing, for electronic engineers, educators, students and hobbyists.

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.

This is a puzzle game in which you need to combine the components into a single circuit: connect all computers to a network server, bring water to the taps, etc.

This electronic circuit simulator is highly interactive giving the feeling of playing with real components. It's very helpful for experimentation and visualization. It's a desktop version of the Circuit JS.

Qucs-S is a spin-off of the Qucs cross-platform circuit simulator. "S" letter indicates SPICE. The purpose of the Qucs-S subproject is to use free SPICE circuit simulation kernels with the Qucs GUI.

Help building prototypes on so called breadboards easily.

Ngspice is a mixed-level/mixed-signal circuit simulator. Its code is based on three open source software packages: Spice3f5, Cider1b1 and Xspice. Ngspice is part of gEDA project, a full GPL'd suite of Electronic Design Automation tools.

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

Integrated schematic editor and simulator. Dynamic analysis updates waveforms and curves as you edit Native digital simulator Worst Case analysis to find the statistical and extreme limits of performance Smoke Analysis to assess how close the circuit is to violating maximum opera.