​​Project Jupyter is a set of free, open-source software tools for interactive computing. These tools support reproducible and collaborative scientific computing and data science across a wide range of programming languages.

The project, which emerged from Cal Poly San Luis Obispo and UC Berkeley and is still led by both, is being embraced by numerous academic and industry data science teams. New features are in development to enable distributed teams to generate computational narratives that include data analysis, predictions, visualizations, and simulations.

The project is the foundation for the web-based Jupyter Notebook. Over the past three years, Jupyter Notebook has become one of the most popular interactive computing environments, with more than three million users from academia and industry.

Further development of Project Jupyter is funded in part by a three-year, $6 million grant from the Leona M. and Harry B. Helmsley Charitable Trust, the Gordon and Betty Moore Foundation, and the Alfred P. Sloan Foundation. The project has also received significant donations from Microsoft, Google, and Continuum Analytics.​

Other participants include Rackspace, Continuum Analytics, Bloomberg, IBM, and more than 400 individual contributors worldwide, as well as numerous Cal Poly students in physics, computer science, and design.