PyScript lets you run Python scripts right in the browser, side by side with JavaScript, with two-way interaction between your code and the web page.

Microsoft's original Python language server back in 2018 was released under the open source Apache License.

PyScript, which is, of course, Python in the browser. The tool is in the early experimental phase, so the project doesn’t suggest using it in a production environment yet.

A new project from Anaconda delivers the Python runtime in a web page, via a single JS include, and with access to many popular Python packages.