Autodesk Circuits is an educational and reference application for designing and testing out electrical circuits. It is an interactive platform for users to learn about the fundamentals of electronics and gain an understanding of the fundamentals of electrical engineering. Autodesk Circuits provides tools to design, simulate, and share electrical projects with a simple, easy-to-use interface. The application also provides access to a library of pre-made components, allowing users to quickly and easily create their own electrical projects. Additionally, Autodesk Circuits supports 3D printing of projects and has a library of 3D-printable components. This application is designed to be used by students, hobbyists, and professionals of all levels who are looking to gain a better understanding of circuit design.
123D circuits can simulate while fritzing cannot simulate.
Fritzing does not allow playable simulations.
KiCad does not have a simulation function.
Fritzing
KiCad
Ktechlab
LibrePCB
EasyEDA
Upverter
gEDA Project
iCircuit
CircuitLab
Micro-Cap
Circuit Tree
TINA
LochMaster
Schematics
VUTRAX
PartSim
QuickCopper
Discontinued The program seems to be no longer updated. The latest version, 0.9.3b, released in June 2016, can still be downloaded from the official website.