I'm building Chimera, which is project that brings sandboxed cell-by-cell (scientific) notebooks to the browser.

It's a blend of Jupyter Notebook, Project Iodide, JSFiddle, CodeSandbox, Glitch, and Observable.

Here are two screenshots:

- Notebook: https://i.imgur.com/nDUC817.png

- View Source: https://i.imgur.com/KhaiCfz.png

This is a tool that I wish existed after having worked with Jupyter notebooks a lot.