Polynote is described as 'Different kind of notebook. It supports mixing multiple languages in one notebook, and sharing data between them seamlessly. It encourages reproducible notebooks with its immutable data model' and is an app in the development category. There are more than 25 alternatives to Polynote for a variety of platforms, including Windows, Mac, Linux, Web-based and Self-Hosted apps. The best Polynote alternative is Jupyter, which is both free and Open Source. Other great apps like Polynote are RStudio, Spyder, Scilab and IPython.