[ideal-Z]

ideal-Z is not a universal circuit simulator like SPICE, it's just an impedance calculator with graphical schematic entry. However, it might be useful for fast calculation of the impedance of almost any passive circuit. Drop components onto the schematic, connect them, set values, and the impedance is calculated instantaneously.
Download here. Windows, free.
Thank you.

It's really hard to tell without knowing the details. If you are still interested in fixing this and willing to help with troubleshooting, please write to ic@sidelinesoft.com.
Thank you.

Simple free analog circuit simulator idealCircuit. Works with ideal components using the same algorithm as NL5, however is much simpler and does not need a license.

Back to Linux: It happened that there are some problems with NL5 HTTP server functioning (see NL5 forum for details), otherwise I'm not aware of other problems...

Currently offering APEC-2011 special discounts and drawing of NL5 Single PC License. Good luck!

OK,
I DO NOT support Linux, I DO NOT support Windows, I support NL5.
Sounds better? 

Oh, I see what you mean.

That's right, I do not provide "support" neither for Linux nor Windows installation, and in fact you won't need it. NL5 is just one file, nl5.exe. There are no dlls hidden in system directories or anywhere else. What you need is copy nl5.exe on hard drive, or even run it from any media, like flash drive or network. For updates or new versions simply replace nl5.exe with a new one.
For Wine, you have to know how to run windows applications there. I can't help with that, I'm not using Linux, sorry!

As for technical support, if Manual or Help reference does not help, you can use NL5 forum, submit question at nl5 website contact page, or better drop email at nl5@sidelinesoft.com. You can call 970-414-0515 as well: this is Sidelinesoft "official" phone, but it's not always available.

Running under WINE is not Linux support.

NL5 is intended to simulate electronic circuits, and it does it well, both on Windows and Linux. What else do you need? What "Linux support" are you talking about?

Why not? Works fine under Wine.

It's college time again, so just a reminder for students: you can get 1 year free license here. Don't forget to indicate your school/department.

Thanks,
Alexei.

[NL5 simulator]

I'm wondering why I did not post here about NL5 simulator a year ago, when it was officially released. However it's not too late, so here it is.
In a few words, NL5 is not SPICE-based, that's why it can do some things that SPICE simulators can not (including free LTSpice). It works reliably with true ideal components, and has some really useful and unique features. Good for students, as well as professionals. No more words, just try it.

Free Demo (no license required, just download and use) is full-fucnctional, with 20 components limit. Students may get 1-year free trial license: simply mention your Institution in the Trial license request.

Any problems - I can help.

Thanks,
Alexei.