John Frampton's package for typesetting Autosegmental Diagrams can be found at: http://www.math.neu.edu/ling/tex/.

LaTeX users will need both the following files: http://www.math.neu.edu/ling/tex/pst-autoseg.tex
http://www.math.neu.edu/ling/tex/pst-autoseg.sty.

See http://www.math.neu.edu/ling/tex/pst-autoseg-doc.pdf for documentation.