LTspice

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.

Free Mac OS X Windows

Ngspice

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.

Free Open Source Mac OS X Windows Linux

Micro-Cap

Micro-Cap 11 is an integrated schematic editor and mixed analog/digital simulator that provides an interactive sketch and simulate environment for electronics engineers.

Commercial Windows

Oregano

oregano - An electrical engineering tool for GNOME oregano is an application for schematic capture and simulation of electronic circuits. The actual simulation is...

Free Open Source Linux

Pspice

Software for Simulating Voltage and Currents of a text file net-list of a electronics components such as Resistors, Capacitors, inductors, transisters, Diodes, Voltage...

Freemium Windows

PartSim

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

Free Web

MacSpice

Simulates and analyses electronic circuits that can range in complexity from a single resistor to an integrated circuit comprising tens-of-thousands of devices.

Free Mac OS X

Gnucap

Gnucap is the GNU Circuit Analysis Package, a modern post-spice circuit simulator with several advantages over Spice derivatives.

Free Open Source Linux

HSPICE

As IC geometries continue to shrink, the need for an accurate circuit simulator is critical. Designers require a highly accurate circuit simulator to precisely predict...

Commercial Windows