There's also Iodide from Mozilla, which is pretty cool: <a href="https://alpha.iodide.io/" rel="nofollow">https://alpha.iodide.io/</a><p>GitHub: <a href="https://github.com/iodide-project/iodide" rel="nofollow">https://github.com/iodide-project/iodide</a><p>Post explaining what it is: <a href="https://hacks.mozilla.org/2019/03/iodide-an-experimental-tool-for-scientific-communicatiodide-for-scientific-communication-exploration-on-the-web/" rel="nofollow">https://hacks.mozilla.org/2019/03/iodide-an-experimental-too...</a><p>It uses this markdown like file format: <a href="https://iodide-project.github.io/docs/jsmd/" rel="nofollow">https://iodide-project.github.io/docs/jsmd/</a>