Repo: https://github.com/ontoplano/ontoplano
Demo: https://demo.ontoplano.com/
modular (you can deactivate features you don't want to use)
integrable (Webhooks, REST API, MCP server)
Just one place to keep all your personal organisation data, easily integrable, in case you want to do something else with this data.
Everyone is being a dick, but I actually did the demo and while it does feel vibe coded its not sloppy when its up. A few hours ago it was doing what the other user reported too but now it is up. The demo introduction feels polished, honestly I dont use these apps so there is never a time I'll find them interesting. But for what its worth I tried adding and organizing a few events and it worked. If it was coded using local AI I'd mention that, but if not then you're never going to have a good time with AI and Lemmy. Not for bad reason either.