XtraK4Me is available as native Java application/API, as a number of GATE plugins or as a Java DBus implementation.
The current realeases can be accessed and downloaded from the following location:
http://resources.smile.deri.ie/nlp/keyphrase-extraction/current/
Here is a link to some older realeases:
http://resources.smile.deri.ie/nlp/keyphrase-extraction/old/
It comes with the source code , a demo program and the dependencies, including documentation.
The pure Java distribution for integration into native Java code can be downloaded at
http://resources.smile.deri.ie/nlp/keyphrase-extraction/current/keyphras...
In order to invoke the keyphrase extraction module inside the GATE platform (i.e. for prototyping),
a bundle containing the necessary plugins is available at
http://resources.smile.deri.ie/nlp/keyphrase-extraction/current/keyphras...
The DBus implementation can be accessed here:
http://resources.smile.deri.ie/nlp/keyphrase-extraction/current/keyphras...
The above mentioned software is released under LGPL.