Suggestions for doublecol

The following packages have something in common with the package doublecol. The packages are ordered in decreasing similarity.

Package threecol: Three-column newsletter output
Package twocolumns: Knuth’s two-column output macros
Package balanced: Balance double-column sections in LaTeX
Package threecolumn: LaTeX output in three columns
Package multicolpar: Put successive paragraphs in different columns
Package automagic: Automatic counter numbering in Plain TeX
Package letter-plain: Letter macros for Plain TeX
Package figplace: Floating figures in Plain TeX
Package lettermac: Simple macros for writing letters (Plain TeX)
Package label-pln: Print address labels in three columns
Package plain-cm: Variable sized fonts in Plain TeX
Package twoside: Two-side typesetting in Plain TeX
Package toc-zar: Plain TeX table of contents macros
Package list: Verbatim listing of text files
Package pi: Calculate pi
Package settosize: Scale text to given width
Package labelmac3: Print Avery 5160 labels for laser printers
Package autotoc: Table of contents in Plain TeX
Package border: Draw a black border around a Plain TeX page
Package boxit: Draw a box around a text
Package bellmac: Outline scheme for form letter production
Package bfsymb: Generate bold symbols in Plain TeX mathematics
Package bibplain: Simple macros for using BibTeX with Plain TeX
Package cassette: Typeset cassette box inserts
Package capparmode: Dropped capitals for Plain TeX
Package cropmrks: Add crop marks to a Plain TeX document
Package dmhgener: Equation, figure (etc.) numbering and referencing
Package defstring: Define macros as verbatim macros
Package fnpara-pln: Footnotes in paragraphs
Package fnote: Auto-numbered footnotes in Plain TeX
Package fixpdfmag: Fix magnification in pdfTeX