There are directories of Fediverse projects:
However, they tend to be a little messy and not easily skimmable. I also wanted to focus on Fediverse alternatives to existing services, although I do like the idea of going on beyond what is offered by current social media.
So, inspired by this discussion (and others), I thought a curated list of the main alternatives (with beginner-friendly sites) might be handy (especially with a potential influx of new users):
Reddit/threadiverse:
Twitter:
Social networks (Facebook, Google+):
Instagram:
YouTube:
WhatsApp:
Media hosting (Flickr, YouTube, SoundCloud, DeviantArt):
Blogs:
Activity planning (Facebook events):
Goodreads:
Dropbox/Drive/Collaboration
LinkedIn:
Linktree:
Music:
Podcasts:
Pinterest:
Search engine (although not federated themselves they search big chunks of the Fediverse):
And if you need some more background then try the Fediverse New User Orientation.
Illustrations from Wikipedia