Imagesource: https://ra3xdh.github.io/

Do you remember the time when there was no GUI for the Circuit Simulator SPICE? I do. Wasn't funny. 😩

Something like LogiSim or Digital at the end of the 90s would probably have made my personal resume look a little different. But let's leave that alone. Today, more than one frontend exists for SPICE, and one of the better known is Qucs. The problem with this one is, that it only supports the commercial and not the free SPICE version. And that was reason enough for the duo Vadim Kuznetsov and Mike Brinson to change exactly that with Qucs-S.

Their software is not new, but just a few days ago they released a 1.0.0 release candidate. And this thing is something to behold. For those who want to simulate digital circuits in physical detail, and do not live on a Mac, Qucs-S is definitely a recommendation.