In CTAN: ctan.org/author/medina-g?lang=en
In tex.stackexchange: tex.stackexchange.com/users/3954/gonzalo-medina
The package offers the placement of background material on the pages of a document.
In CTAN: ctan.org/pkg/background
Package documentation: mirrors.ctan.org/macros/latex/contrib/background/background.pdf
Decorates individual paragraphs of a document.
In CTAN: ctan.org/pkg/fancypar
Package documentation: mirrors.ctan.org/macros/latex/contrib/fancypar/fancypar.pdf
Both packages are contained in TeXLive and in MiKTeX.