The original MontyLingua project was used by many for their NLP research. But the licensing terms of this project was a bit confusing.
If it is your intent to use this software for non-commercial, non-prioprietary purposes, such as for academic research purposes, this software is free and is covered under the GNU GPL License, given here: <http://www.gnu.org/licenses/gpl.txt> and in the APPENDIX of this document. If you are interested in this software for commercial purposes, commercial licensing information is available. Please email (firstname.lastname@example.org) for more information.
The author didn't respond to email enquiring about the commercial license and after the discussions at reddit, it was noted that one can get a copy of MontyLingua under GPL for non-commercial use and then re-release it under again under GPL for all kind of usage.
I have been using MontyLingua for a few months and have made some changes and bug fixes to the project. So I thought it would be best to contribute back to the community by re-releasing it fully under GPL as a new fork.
How to Contribute
The source is now in a mercurial repository and anyone can clone the project, make bug fixes and send in the patches or do a pull request. To get the source code, just
$ hg clone http://bitbucket.org/cnu/montylingua3/wiki/
Originally a separate project, ConceptNet v.2.1 is included in MontyLingua. However, ConceptNet is under ongoing development as ConceptNet3:
ConceptNet3 is available for redistribution under a GPL license, compatible with MontyLingua3.
Data used in ConceptNet is derived from the OpenMind project, also Open Source:
OpenMind uses a reasoning engine, Divisi, also written in Python, using the NumPy module, with extensions in C. Divisi is likewise available for redistribution under GPL: