I haven't looked, but would advise you to perservere in your search. I was looking for a good 3D CFD program, and eventually found one, but only after many people said that it did not exist. Look, particularly, at more specialized forums.
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There is more to life than just eating mice.
I'm not sure what you mean by simultaeous, but this guy offers a shareware electrical calculation program that you can demo for free and it's really cheap if you like it.
http://www.lmphotonics.com/
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** All I every really wanted to be, was... A LUMBERJACK!.**