Richard MacManus: The fediverse is a collection of decentralized social media services that interconnect via ActivityPub. The most prominent member of the fediverse is Mastodon, a microblogging network that launched in 2017. But many other Web 2.0-style apps have been built on ActivityPub — including Bookwyrm (Goodreads), Lemmy (Reddit), PeerTube (YouTube), and PixelFed (Flickr).[…]With ActivityPub, […]