Pixelfed is an Instagram-style photo network on the Fediverse. You can follow Pixelfed accounts from Mastodon and vice versa.

For example, @Iancylkowski is a Pixelfed account, but you can view and interact with it entirely in Mastodon too.

To create a Pixelfed account, find a server at:

➡️ https://pixelfed.org/servers

You can use Pixelfed through the web or apps.

The official apps aren't ready yet, but there are good third party ones such as @vernissage for iPhone/iPad and @PixelDroid for Android