Jupyter Versioning & Comments by Curvenote is a free add-on and tool for the Chrome browser. It allows users to add comments, cell and notebook versioning, and real-time collaboration to JupyterLab and Notebooks. This tool is provided by curvenote.com.

With Jupyter Versioning & Comments, users can easily add cell-based commenting and version control to their local Jupyter Lab and Jupyter Notebook. These features sync with the user's content on curvenote.com, enabling collaborative editing and versioning of notebooks between reports, presentations, and the development environment.

By saving a cell or a notebook, users can easily share, version, comment, and incorporate results into other documents. Jupyter Versioning & Comments offers a seamless integration with JupyterLab and Notebooks, enhancing the collaboration and version control capabilities of these platforms.