label-pln – Print address labels in three columns
Input may be a set of labels in-line in a document, or a file of labels.
Maybe you are interested in the following packages as well.
- twoside: Two-side typesetting in Plain TeX
- twocolumns: Knuth's two-column output macros
- labels: Print sheets of sticky labels
- lextex: Typesetting legal documents using plain TeX