chom­sky – Macros to type­set pars­ing trees

Macros for type­set­ting pars­ing trees that (ap­par­ently) don't rely on any other pack­ages (the trees are drawn in LaTeX pic­ture mode).
The macros were orig­i­nally ad­ver­tised for use with LaTeX 2.09, but will prob­a­bly work with cur­rent LaTeX.