[davebranton]

My (much simpler, decades old) one

https://plasticeagle.com/fractal.html

I'm sure many people have written similar things, in various technologies, over the years. Let's see them.

[evnp]

I'll admit the UX there took me a while to figure out, once you move one point in the mini-map everything makes sense. Incredibly fun to play with.

It has rough edges, and showing its age (at least a decade), but here's my contribution: https://evnp.github.io/3cursion/

[smusamashah]

This is very good, it keeps iterating adding more detail every run.