#PixelFed is a free open federated alternative to Instagram.
It's part of the Fediverse, so you can follow PixelFed accounts from Mastodon, Pleroma etc.
You can sign up at many different instances, for example:
(You can find more instances at https://the-federation.info/pixelfed )
You can follow PixelFed's official account at:
At the moment, the easiest way is to click on the account's follow button next to their profile in Mastodon itself. Here's an example account:
To bring a Pixelfed account up in Mastodon, put the account's Pixelfed address into the Mastodon search box and search for it.
For example, searching for
brings up the account
(By the way, there is a much easier method called "remote follow" which is currently being worked on.)
mastodon.at is a microblogging site that federates with most instances on the Fediverse.