Webspaces[1] is my answer to this call for the 3D web emergent metaverse. It's just HTML that you can host anywhere that is rendered as a 3D multiplayer world via p2p webrtc.
Ok, that is one of the weirdest and greatest little web experiences I've had in a while. I walked around shooting other (presumably fellow HNer) characters with my smiley emojis with a big goofy smile on my face. Really neat project!
And you can add objects to the scene. Neat!
glad you enjoyed it!
This was the first sort of idea I had when I discovered AFrame, and I'm glad to see someone implementing something like this!