XMLgawk is an extension of GAWK (the GNU
implementation of the AWK programming language)
for processing XML data. XMLgawk is just one of
the extensions that come with the xgawk
distribution. The others are the PostgreSQL and
the MPFR extensions.
ascii2abctab converts "asciitab" guitar notation
(such as you would find posted all over the
Internet) to abctab, which you can then convert to
Postscript with abctab2ps to make pretty printouts.