[abhgh]

This is a great list, thanks!

I would add two more:

1. VizHub [1]: for D3 based visualizations. I have not tried it, but I have watched some D3 videos [2] by its creator Curran Kelleher who uses it quite a bit (oh, and a shout out to the great D3 content he has!).

2. This is slightly unusual but I have recently been using svelte's REPL notebooks [3] to try out ideas. Yes this is for svelte scripts, but you can do D3 stuff too. And on that note, svelte (which is normally seen as a UI framework) can be used for pretty interesting visualizations too, because how it can bind variables with SVG elements in HTML (you can get similar results with React as well). For ex., here's a notebook I wrote for trying out k-means using pure svelte [4]. Be warned: fairly unoptimized code, because this was supposed to be an instructive example! On a related note, Mathias Stahl has some content specifically for utilizing svelte with D3 [5].

[1] https://vizhub.com/

[2] https://www.youtube.com/watch?v=_ByiP7KM0So

[3] https://svelte.dev/repl

[4] https://svelte.dev/repl/1689f5c3699640ff86d9bd6a04ac8272?ver... Note that the "Iterate!" button iterates once; keep clicking it to move things along.

[5] https://www.youtube.com/watch?v=eNQQAkjxxdQ