Download of Swizard 4.6 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The software is included in Education Tools. This software was originally designed by Serge I. Gorelsky.
From the developer:
SWizard is a user-friendly program (supported OS: MS Windows 2000, Windows XP) for postprocessing of spectral data. A spectrum is convoluted as a sum of Gaussian, Lorentzian, or pseudo-Voigt functions.
For UV-Vis spectra, the program reads excitation energies and oscillator strengths directly from output files and produces electronic spectra of molecules in the ASCII data format.
You may want to check out more software, such as Travoltage, Deming or MathFlow for XMetaL, which might be similar to Swizard.