PublicSpaces is a non-profit coalition of Dutch broadcasters, museums, arts organisations etc. campaigning for an ethical internet. They organise conferences on this topic, and run their own Fediverse servers.
You can follow at (all in English):
➡️ @firstname.lastname@example.org (main account)
➡️ @email@example.com (videos)
➡️ @TheTimeIsNow (podcasts)
More info at https://publicspaces.net
A newer server operated by the Mastodon gGmbH non-profit