Quoting from https://medium.com/we-distribute/faces-of-the-federation-christopher-allan-webber-on-mediagoblin-and-activitypub-24bbe212867e https://medium.com/we

Quoting from https://medium.com/we-distribute/faces-of-the-federation-christopher-allan-webber-on-mediagoblin-and-activitypub-24bbe212867e https://medium.com/we-distribute/faces-of-the-federation-chr... > Aardwolf, Bridgy Fed, distbin.com, dokieli, Funkwhale, Hubzilla, Kroeg, Mastodon, Nextcloud, Numaverse, PeerTube, places.pub, Pubstrate, Smilodon, tags.pub, Pleroma, Pump.io, and Rustodon are all either implementors of or are currently implementing ActivityPub. In addition to those, https://pixelfed.org/ https://pixelfed.org/ is in the process of implementing federation with AP.