Garage is an open source S3-compatible object storage cluster designed for self hosting - eviltoast
Garage - An open-source distributed object storage service
garagehq.deuxfleurs.fr
An open-source distributed storage service you can self-host to fullfill many needs.

Note: I am not affiliated with this project in any way. I think it’s a very promising alternative to things like MinIO and deserves more attention.