Livewire is a sophisticated software package for designing and simulating electronic circuits.

Qucs-S is described as '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' and is a circuit simulator in the education & reference category. There are more than 25 alternatives to Qucs-S for a variety of platforms, including Windows, Linux, Mac, Web-based and iPhone apps. The best Qucs-S alternative is Circuit JS, which is both free and Open Source. Other great apps like Qucs-S are QUCS, LTspice, Proteus PCB design and EasyEDA.
Livewire is a sophisticated software package for designing and simulating electronic circuits.

Circuit Wizard is a revolutionary new system that combines circuit design, PCB design, simulation and CAD/CAM in one complete package.

Printed Circuit Board Design Made Easy: Professional-Grade PCB Design Software with Free Live Technical Support. PCB Artist Includes Features Such as Multi-Page Schematics and Netlist Import.



Emulino is an emulator for the Arduino platform by Greg Hewgill, originally found on emulino: arduino cpu emulator.
Drawlogix is a complete professional tool for the design, development and simulation of electronic circuits. Is extremely easy to use and offers optimum integration functions to focus solely on the design aspects of the work.



Xyce (zi¯s, rhymes with “spice”) is an open source, SPICE-compatible, high-performance analog circuit simulator, capable of solving extremely large circuit problems by supporting large-scale parallel computing platforms.