ActivityPub is a decentralized social networking protocol standardized by the World Wide Web Consortium (W3C). It includes both an API for social networking clients and an API for server-server federation.
Modeling non-verbal communication as an ActivityStreams extension
Package mstdn provides tools for working with the Mastodon API, which is becoming the (defacto) stand client-server API for the Fediverse
Lipupini is a public domain platform for organizing computer files like images, videos, sounds and writings that you might want to display under your domain on the Internet