We already have dozens of apps that do that one way or another. I wish we had a proper standard protocol for doing this by now. Something maybe based on mDNS,

We already have dozens of apps that do that one way or another. I wish we had a proper standard protocol for doing this by now. Something maybe based on mDNS, avahi, webdav, and a little glue, so we can implement and run this anywhere. And without requiring internet access at all.