JDK and NetBeans software are recommended. They are available from here.
A paper on assigning asymmetric microwave spectra can be found here.
Here is presentation WH06 given at the 68th ISMS at Columbus, Ohio.
Here is a version that should(!) work on Windows 7 with a screen resolution of 1440x900 or higher. New! December 1st 2013 version!
Here is a version that should(!) work on Windows 7 with a screen resolution of 1260x700 or higher.
Here are a collection of YouTube video tutorials that may help in learning how to use SpecFitter.
Here is a GUI that can help create a var file for use in SPCAT.
Here is a free induction decay from a chirped pulse Fourier transform microwave spectrometer.