Pluto.jl [1] is an interesting project around creating reproducible notebooks. MIT's Intro to Computational Thinking uses it for displaying interactive code cells [2].

They're reactive cells too, so if you modify an variable or function, subsequent cells will automatically update. Something that Jupyter lacks currently.

[1] - https://plutojl.org/

[2] - https://computationalthinking.mit.edu/Fall23/