The document summarizes the key natural language processing tools available in the Stanford NLP Toolkit and Apache OpenNLP. The Stanford NLP Toolkit provides tools for tasks like tokenization, part-of-speech tagging, named entity recognition, parsing, coreference resolution, and information extraction. Apache OpenNLP also supports common NLP tasks including sentence detection, tokenization, named entity recognition, document categorization, part-of-speech tagging, and chunking. The document also lists some other popular NLP libraries and tools.