Not only that, but Qucs also has a SPICE version which sees a lot of activity, and unlike QucsStudio, is free software: https://ra3xdh.github.io https://ra3xdh.

Not only that, but Qucs also has a SPICE version which sees a lot of activity, and unlike QucsStudio, is free software: https://ra3xdh.github.io https://ra3xdh.github.io It's only missing a solid components library like LTSpice has. Hopefully its library will see more contributions as it becomes more popular.