What we have in the #Fediverse today:
1. Facebook-like (Friendica, Hubzilla, Streams, Social home, Misskey & forks)
2. Twitter-like (Mastodon & forks, Pleroma & forks, Threads)
3. Goodreads-like (BookWyrm)
4. YouTube/Vimeo-like (PeerTube)
5. Reddit/Quora/Stackexchange-like (Lemmy, Kbin, Mbin, Piefed)
6. Podcasting
7. Medium-like (Write freely, Plume)
8. Instagram/Flickr-like (Pixelfed)
9. Audio hosting (Funkwhale)
10. Blogger (WordPress and Drupal via plugin; also GoHugo)

Coming soon!
1. TikTok-like (Loops by Pixelfed)

Someone working on:
* Tumblr-like

Skin-based:
* Forum-like skin that turns a Lemmy instance into a "forums".

What else is the Fediverse network missing?
* An easy way to pull in data from databases like TMDB, and display it like a widget with necessary information visible (instead of a link-type with only a summary of the description).

* A way to show what we are currently listening, watching, and reading, everytime we update our, say, BookWyrm or Goodreads profile. Maybe as an info minibar in our profile.

We can also use LibreFM and LastFM for the listening part.