LTspice

KiCad is an open source software suite for electronic design automation (EDA) - designing schematics of electronic circuits and printed circuit boards (PCB). KiCad is developed by Jean-Pierre Charras. And features an integrated environment between schematic capture, bill of...

BOOLR is a digital logic simulator built with HTML and JavaScript using Electron . Simulations run asynchronously and in ticks so complex simulations won't cause freezes.

Multisim is industry-standard SPICE simulation and circuit design software for analog, digital, and power electronics in education and research.