There are two ecosystems out there in the decentralized social networking space these days. There's the Fediverse, built on top of the ActivityPub protocol, and there's now a parallel set of software popping up around Bluesky and the AT Protocol (or "ATProto"). The Fediverse now has PeerTube (a YouTube-like service), Pixelfed (like Instagram), and Loops (like TikTok). In the ATProto world, there are apps like Pinksky (like Instagram) and Skylight (like TikTok).