Did you know that communitywiki.org/trunk exists?

It's a new project where you can find people in the Fediverse and follow them by topic.

Also, you can request to be included. It's a really cool idea.

If you are new to Mastodon or you are looking for more interesting people to follow, you should check it out.

Ruby.social

A Mastodon instance for Rubyists & friends