Everyone here may be familiar with the MusicBrainz project. But much like Wikimedia, the foundation behind the project has quite a few lesser known open data projects:
AcousticBrainz acoustic information
ListenBrainz user listening habits
CritiqueBrainz music reviews
BookBrainz information about published literature
That’s really neat, but I was thinking more along the lines of free cultural works. Much like what Peertube already does, but for everything. Like the search and index features of Funkwhale but with everything libre culture.