Towards the end of last year I wanted to do a hobby programming project and I had just finished my introduction to QM course. So to learn some rust+wasm I built a visualization for hydrogen orbitals:
https://ahartik.github.io/orbitals/
You can zoom using mouse wheel (or multitouch on mobile) and pan using mouse.
Let me know if you have ideas for improvements. I might write a blog post about this later, there are some clever tricks in the shader code.