Ngspice

Ngspice is a mixed-level/mixed-signal circuit simulator.

20 Alternatives To Ngspice

Altium Designer

PCB Design Software

Autodesk EAGLE

Autodesk EAGLE is an electronic design automation (EDA) software.
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Circuit Simulator

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

Circuit Wizard

Circuit Wizard is a revolutionary new system that combines circuit design, PCB design, simulation…

DipTrace

DipTrace - Professional Schematic Capture and PCB Design Software
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Electronics Workbench

In 1999 the companies merged, and renamed itself after its most well known product, Electronics…

Fritzing

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

KiCad

A Cross Platform and Open Source Electronics Design Automation Suite

Ktechlab

KTechLab is an IDE for microcontrollers and electronics.
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LTspice

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

LibrePCB

LibrePCB is a free EDA software to develop printed circuit boards.
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PartSim

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

Proteus PCB design

Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a…

QUCS

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.

Qucs-S

Qucs-S is a spin-off of the Qucs cross-platform circuit simulator.
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VeeCAD

VeeCAD takes a schematic generated netlist and assists you to build a layout - on strip…
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Virtual Breadboard

It is a circuit simulator on a virtual breadboard.
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Xcos

Xcos is a graphical editor to design hybrid dynamical systems models.

gEDA Project

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

iCircuit

Its advanced simulation engine can handle both analog and digital circuits and features realtime…