  In all applications of gamma-ray spectroscopy, one of the most important and
delicate parts of the data analysis is the fitting of the gamma-ray spectra,
where information as the number of counts, the position of the centroid and the
width, for instance, are associated with each peak of each spectrum. There's a
huge choice of computer programs that perform this type of analysis, and the
most commonly used in routine work are the ones that automatically locate and
fit the peaks; this fit can be made in several different ways -- the most
common ways are to fit a Gaussian function to each peak or simply to integrate
the area under the peak, but some software go far beyond and include several
small corrections to the simple Gaussian peak function, in order to compensate
for secondary effects. In this work several gamma-ray spectroscopy software are
compared in the task of finding and fitting the gamma-ray peaks in spectra
taken with standard sources of $^{137}$Cs, $^{60}$Co, $^{133}$Ba and
$^{152}$Eu. The results show that all of the automatic software can be properly
used in the task of finding and fitting peaks, with the exception of
GammaVision; also, it was possible to verify that the automatic peak-fitting
software did perform as well as -- and sometimes even better than -- a manual
peak-fitting software.
