wacrgEIS is software developed for the West Australian Corrosion Research Group (wacrg) for analysis of electrochemical impedance. At the moment it consists of: equivcctfit, kramkron, simulate, fixscoc, splitimpedances, tabulatenets and z2bouk:

• equivcctfit: tries to fit a circuit description (netlist) to an impedance.
• kramkron: performs the famous Kramers-Kronig transform on an impedance.
• simulate: computes the impedance of a circuit description (netlist) over a given range of frequencies.
• fixscoc: corrects an impedance measurement for the known short and open circuit instrumentation impedances.
• splitimpedances: splits a single file containing multiple impedance data into seperate files. It might be useful for splitting the results of simulate and fixscoc when they're run on batches.
• tabulatenets: tabulates a set of netlists into a format where the component values can be easily plotted.
• z2bouk: is a perl script that converts Schribner Associates' Zplot data files to Boukamp format. This is the format used by the software.

The advantages of wacrgEIS over other impedance analysis software is that it is strongly batch oriented; its open source; and its free.

The disadvantage: there is no fancy GUI. You have to find your own means of plotting results. GNU Plot is a good option, or you can use a spreadsheet.

wacrgEIS is only available in source code form at the moment, which means you need a C compiler and a few other libraries (libGSL and PGAPack, see BUILDING.TXT in the source distribution.) You can download the source code from here. You can also visit the the project page on Sourceforge.