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
- automagic: Automagic numbering in Plain TeX
- balance: Balanced two-column mode
- figplace: Floating figures in Plain TeX