phpSyntaxtree - a syntax tree generator for linguists. Draw syntax trees from labelled bracket notation phrases and include them into your assignment/homework.
V. Engerer. SDV – Sprache und Datenverarbeitung. International Journal for Language Data Processing, 36/2 (2012) = E-Books – Fakten, Perspektiven und Szenarien, 36 (2):
71--91(2012)