Many thanks to SWLing Post contributor, Grayhat, who writes: Maybe it's old news for you, I just discovered it and thought you may be interested, the commercial circuit simulator "Micro-Cap 12" which was sold at around $4,500 for each license is now *free*, I found the information here along with some further details: https://hackaday.com/2020/01/08/commercial-circuit-simulator-goes-free/ The ["]