Nice. This obviously references https://doodle.com/ , which was super popular 15 years ago (in Europe), but then turned unnecessary complex, added intruisive advertisements and aggressive monetisation.

Would love to see a popular option that stays free.

There was dudle [1] developed and hosted by a German university. Seems unmaintained, but there is an independent project called BitPoll [2].

[1]: https://github.com/kellerben/dudle [2]: https://github.com/fsinfuhh/BitPoll

https://crab.fit/ is an open-source solution. It has a different interface that is much more compact and convenient. I honestly love it.

This has been online for a good number of years. I think Framasoft have their own hosted version.

Well, follow the link and you can see it :)

This is running https://framagit.org/framasoft/framadate/framadate which is no longer maintained, I'm unsure if they've forked it

Probably not, according to the person that set the system up originally: https://fedifreu.de/@chpietsch/113605585123034992

With that name, I was wondering if this is SFW initially.

It looks like a simple way to schedule things without all the annoying ads you usually see. It is nice that you do not have to make an account just to set up a quick meeting.