Today I discovered this: https://mastodon.cloud/@stacksmith
I don't see any commits on the main branch since March of 2020 (😬) but it is amazing that someone has put this much effort into a recreation that is both faithful (it has a literal hypercard stack importer) and modern (it doesn't visually look like a retrocomputing exercise).
@glyph this is pretty awesome. Is there something that fills that niche right now? For all the "nocode" stuff I've heard about I don't think I've seen anything very compelling.