MorphAdorner includes a Java port of the Carnergie Mellon University link grammar parser, a syntactic parser for English. The link grammar parser is a natural language parser based on link grammar theory. Given a sentence, the system assigns to the sentence a syntactic structure consisting of a set of labeled links connecting pairs of words. The parser also produces a "constituent" representation of a sentence (showing noun phrases, verb phrases, etc.). More information is available at: http://www.link.cs.cmu.edu/link/.

Note that the parser uses the Penn Treebank part of speech tag set, not the NUPOS tag set.

You can try MorphAdorner's link grammar parser online.