Detail irsim is an X11 based simulator for MOS circuits. It has two simulation modes, either switch where each transistor is modelled as a voltage controlled switch, or linear where each transistor is modelled as a resistor in series with a voltage controlled switch, and each node has a capacitance. Where and How to obtain it. Ca Description Spice is an analog circuit emulator. Status Stable release.
System requirements Unknown.
Detail Spice allows you to design and test circuits in a computer modelled environment to see how they will behave without having to touch a soldering iron, or solder. A readme file comes with the package. Where and How to obtain it. Description svgafft is a spectrum analyser for Linux. Status Alpha, but usable.