Use this popular open-source software library for natural language processing (NLP) in Python. NLTK provides a wide range of tools and resources for tasks such as tokenization, stemming, lemmatization, part-of-speech tagging, parsing, semantic reasoning, and machine learning for text classification and sentiment analysis.

• Type: Programming - Text Analysis
• Use on: Linux, Mac, Server, Windows
• Cost: Open Source
• Visit this Resource: https://www.nltk.org/