NLTK

NLTK (Natural Language Toolkit) is a comprehensive Python library designed for working with human language data. It provides interfaces to over 50 corpora and lexical resources, as well as libraries for text processing tasks including classification, tokenization, stemming, tagging, parsing, and semantic reasoning. NLTK is widely used by academics, students, researchers, educators, and engineers for natural language processing, computational linguistics, and language data analysis. It is free, open source, and compatible with Windows, macOS, and Linux.