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.
Maybe you are interested in the following packages as well.
- rrgtrees: Linguistic tree diagrams for Role and Reference Grammar (RRG) with LaTeX
- xyling: Draw syntactic trees, etc., for linguistics literature, using xy-pic
- synttree: Typeset syntactic trees
- pst-tree: Trees, using PSTricks