[jeena]

Kind of, Mastodon is the 'Twitter' part of the fediverse, PeerTube is the 'YouTube' part, Pixelfed is the 'Instagram' part, there are even people who try to use ActivityPub for things you do on GitHub normally. And you can follow and interact between all of them (theoretically and to some degree actually too).

But what you're looking for sounds mostly like Diaspora, which is quite old, it's from back in the Google+ days, and never really took off.

[halbritt]

I started to get an instance of diaspora going, but it was too icky and so I had to give up.