CoreNLPstanfordnlp/CoreNLP
Stanford CoreNLP provides a set of natural language analysis tools which can take raw English language text input and give the base forms of words.

cortical-io/Iris
Cortical.io's FREE NLP, Retina API Analysis Tool (written in JavaFX!) - See the Tutorial Video.
Stanford CoreNLP provides a set of natural language analysis tools which can take raw English language text input and give the base forms of words.
A machine learning based toolkit for the processing of natural language text.
Machine Learning framework for rapid development of Machine Learning and Statistical applications.
A Java-based package for statistical natural language processing, document classification, clustering, topic modelling, information extraction, and other machine learning applications to text.
This project collects a number of core libraries for Natural Language Processing (NLP) developed in the University of Illinois' Cognitive Computation Group, for example illinois-core-utilities which provides a set of NLP-friendly data structures and a number of NLP-related utilities that support writing NLP applications, running experiments, etc, illinois-edison a library for feature extraction from illinois-core-utilities data structures and many other packages.