LinkParser

LinkParser is a syntactic parser by Davy Temperley, Daniel Sleator and John Lafferty of Carnegie Mellon University. It is being ported to Ruby by Martin Chase.

There is also a binding under development for the improved link-grammar library created for AbiWord. That's what I use for testing and for my own projects. There are other bindings for link-grammar, but they are untested and may not be API-compatible with this library.