NLTK — the Natural Language Toolkit — is a suite of open source Python modules, data and documentation for research and development in natural language processing.

NLTK development has moved to https://github.com/nltk as of October 2011.

• NLTK Home - the starting point for users including download instructions
• Source - browse NLTK source code
• Issue Tracker - submit feature requests, bug reports, and patches
• DevelopersGuide - useful guidelines for code cutters
• Jenkins - automated testing of NLTK code (courtesy of Shining Panda)
• People - the NLTK team