Google has recently open-sourced its Natural Language Understanding system SyntaxNet and the English parser Parser McParseFace. Yes, that's its' real name, and it sounds stupid.
It's built on Google's machine learnign software TensorFLow, which is also open-source.
Google announcement:
http://googleresearch.blogspot.co.uk/2016/05/announcing-syntaxnet-worlds-most.html
The verge article:
http://www.theverge.com/2016/5/12/11666414/google-parsey-mcparseface-tensorflow-open-source-language-tool
spaCy article:
https://spacy.io/blog/syntaxnet-in-context
Wired article:
http://www.wired.com/2016/05/google-open-sourced-syntaxnet-ai-natural-language/
==================================================
Facebook: https://www.facebook.com/RichardAspdenOfficial
==================================================
Twitter: http://twitter.com/ImRichardAspden
==================================================
The full list: http://richardaspden.com/contact-me/
==================================================