TurboParser - Dependency Parser with Linear Programming

Link: http://www.ark.cs.cmu.edu/TurboParser/

Intro: TurboParser is a free C++ implementation of a multilingual non-projective dependency parser based on linear programming relaxations.

Fangorn: a system for querying very large treebanks

Link: http://nltk.ldc.upenn.edu:9090/index

Intro: Fangorn is an open source tool for querying very large treebanks, built on top of Apache Lucene.  Fangorn implements the LPath linguistic path language, which has an XPath-like syntax along with linguistically motivated extensions.  Result trees are annotated with the query in order to show how the query matched the tree, and these annotations can themselves be modified and submitted as further queries.

PML Tree Query

Link: http://ufal.mff.cuni.cz/~pajas/pmltq/

Intro: PML-TQ is an powerful open-source search tool for all kinds of linguistaically annotated treebanks with several client interfaces and two search backends (one based on a SQL database and one based on Perl and the TrEd toolkit). The tool works natively with treebanks encoded in the PML data format (conversion scripts are available for many established treebank formats).

FRED

Link: http://wit.istc.cnr.it/stlab-tools/fred

Intro: A tool for automatically producing RDF/OWL ontologies and linked data from natural language sentences, currently limited to English.

Paper: http://ekaw2012.ekaw.org/node/137