Pixelfed has more than 100,000 active users, about 5 times what it was 6 months ago, so I wouldn’t really call it dead. And with the fediverse, pixelfed and mastodon can talk to each other, so even on less active platforms you can connect with millions of other people. Most of the accounts I follow on pixelfed are from mastodon.

There’s pinetta that’s inspired by pinterest, but the repo hasn’t been updated in a couple years.