UIMAfied Open Source NLP Tools:

OpenNLP - A collection of open source Java projects related to natural language processing. The main projects include: 

• Maxent - A Java package for training and using maximum entropy models 
• OpenNLP Tools - A collection of Java NLP tools based on the Maxent package. The tools include a sentence detector, tokenizer, POS tagger, parser, named-entity detector, and co-reference resolver. This package of tools has already been wrapped as UIMA components, and the wrappers are included in the UIMA SDK as sample code. More information about OpenNLP wrappers is found here. 

LingPipe - LingPipe is a suite of Java libraries for the linguistic analysis of human language. 

LingPipe Tools - track mentions of entities (e.g. people or proteins); link entity mentions to database entries; uncover relations between entities and actions; classify text passages by language, character encoding, genre, topic, or sentiment; correct spelling with respect to a text collection; cluster documents by implicit topic and discover significant trends over time; and provide part-of-speech tagging and phrase chunking. Two examples are listed below to show how to wrap LingPipe annotators as UIMA components; LingPipe Classifier and LingPipe Named-Entity detector.