You can download the file monoid-2.4.tgz (size 83k) from here.
The MONOiD 2.4 distribution contains the following files.
README the README file.
init.g the init file of the package.
In the subdirectory lib:
action.g the GAP library files.
monoid.g
monorela.g
monotran.g
transfor.g
relation.g
In the subdirectory doc:
manual.dvi the 'dvi' version of the MONOiD manual
monoid.bib the bibliography.
manual.tex the chapters of the manual:
action.tex Actions of Monoids
monoid.tex Monoids and Semigroups
transfor.tex Transformations
relation.tex Binary Relations
monotran.tex Transformation Monoids