w3c

• ActivityPub

  The W3C standard powering the Fediverse. A decentralised social networking protocol that lets servers talk to each other - the foundation of Mastodon, Pixelfed, PeerTube, and more.

• Webmention

  A W3C standard for cross-site conversations. When you link to someone's post, their site can be notified. Brings replies and reactions back to the open web, without centralised platforms.