QUCS is a pretty awesome tool considering the price :)
I didn't realize that QUCS-S did EM simulation (section 3.1.6.2 in this article) and I'm curious what the features/limitations are. The killer feature in a tool like this for signal integrity applications would be support for IBIS or IBIS-AMI models for time donation simulation... There's a great FOSS simulator for AMI but it's not integrated with a schematic environment.
Considering how slowly EDA/simulation tools move combined with their insane cost, it's an area that's certainly ready for a FOSS tool to move in the way software tools have gone.
Holy cow, I had heard all of those acronyms but did not even realize QUCS-S and QucsStudio were actually different, thank you for pointing that out. (This also necessarily shows that I didn't do a good enough job reading your work here).
I didn't realize that QUCS-S did EM simulation (section 3.1.6.2 in this article) and I'm curious what the features/limitations are. The killer feature in a tool like this for signal integrity applications would be support for IBIS or IBIS-AMI models for time donation simulation... There's a great FOSS simulator for AMI but it's not integrated with a schematic environment.
Considering how slowly EDA/simulation tools move combined with their insane cost, it's an area that's certainly ready for a FOSS tool to move in the way software tools have gone.