threecol – Three-column newsletter output
The code, developed from an example in the TeXbook, provides a simple three-column output routine for Plain TeX.
Maybe you are interested in the following packages as well.
- multicolpar: Put successive paragraphs in different columns
- figplace: Floating figures in Plain TeX
- letter-plain: Letter macros for Plain TeX
- label-pln: Print address labels in three columns