Pinetta is/was in development but seems dead with only an alpha release. I am chasing this up on Matrix. edit: Apparently still, technically, active although progress has been slow
Pinry is a FOSS alternative, but not federated, that seems dormant. However, it works and is in Python, so someone could bolt an AP server to it, he says airily.
Apparently, Pinetta is still active. There is an alpha release but it seems like the devs were struggling with time limitations and getting the AP protocol right. It is in Python if anyone wants to take a look.
Idk about you but I use pinterest to find inspo for all kinds of things. For that to work, the posts need extensive hashtagging/indexing that goes beyond the occasional hashtag on Mastodon I think. In Pinterest, I really want their Algorithm to find the stuff I don't know yet I'm looking for. If that kind of search existed, we wouldn't need a specific Pinterest clone I guess - maybe a topic-board thing on Pixelfed would be enough if the indexing would be sufficient.
That sounds good! If Pixelfed or similar implemented that, it could be sufficient. A new fedi service starting from scratch would lack the existing pool of resources since federation only happens when a post gets posted/boosted but after some time it could actually be useful.