Misskey or Calckey or Akkoma - all three are microblogs (like Mastodon), but with fancy formatting. Animated text, flipped text, different sizes and custom emoji reactions
Pixelfed for photos
Mobilizon is federated software for events. They have no home feed. You can create an event, participate in another, create and manage a group (including group events, discussions, private and public announcements and resource files)
slicedcheesegremlin