Jupyter NbClassic

Jupyter NbClassic is an implementation of the classic Jupyter Notebook 6 as a Jupyter Server extension. It allows users to continue using the Notebook 6 tech-stack and its associated extensions and customizations alongside newer Jupyter environments like Notebook 7 or JupyterLab. The project is currently at version 1.3.3 and receives ongoing maintenance, primarily focusing on security and bug fixes while providing a stable, familiar interface. [1, 6, 7, 14]