Twilio - Brings voice and messaging to your web and mobile applications.
Scikit-learn - scikit-learn (formerly scikits.learn) is an open source machine learning library for the Python programming language.
Bandwidth - Bandwidth offers SIP trunking, Emergency communications, and Voice & Messaging APIs.
Pandas - Pandas is an open source library providing high-performance, easy-to-use data structures and data analysis tools for the Python.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
NumPy - NumPy is the fundamental package for scientific computing with Python