Looking for an accordion wizard package



I found a few wizard packages on Atmospheric, e.g. this: https://atmospherejs.com/forwarder/autoform-wizard

I am looking for something similar functionally, only with a different design: once a part of the wizard is completed, the next part opens below the previous parts (the previous parts may or may not collapse in accordion-like fashion).

I’ve seen this kind of design in google adwords signup and a number of other places.

I am mostly looking for a name or a keyword to search for.