
LTspice
KiCad
Fritzing
EasyEDA
Proteus PCB design
Altium Designer
Autodesk EAGLE
Qucs, briefly for Quite Universal Circuit Simulator, is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit.

Mailflow.sh
Stackmail is a webmail service whereby you can log in to your emails from any browser at any time!

Which is more popular?
Based on our record, QUCS seems to be more popular. It has been mentioned 1 time since March 2021.
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Qucs Tutorial: Simulating a common emitter bjt amplifier circuit
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The Qucs cross-platform circuit simulator is a spin-off of Qucs. The letter S stands for the SPICE engine, which performs all simulations within the software. The Qucs subproject's goal is to integrate free SPICE...
QUCS – Quite Universal Circuit Simulator is a free simulation software developed on GNU/Linux environment. Well, this software really works on other operating systems such as Solaris, Apple Macintosh, Microsoft...
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If you can get s parameter model you can use that. There are also generic transformer and coupled line models so long as you've got a way of characterising it you should be able to model it. https://sourceforge.net/projects/qucs/. Source: over 3 years ago
Tracking StackMail since Aug 2023.
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