https://github.com/versity/versitygw
Unlike other options like Garage or Minio, it doesn't have any clustering, replication, erasure coding, ...
Your S3 objects are just files on disk, and Versity exposes it. I gather it exists to provide an S3 interface on top of their other project (ScoutFS), but it seems like it should work on any old filesystem.
These things can fail 99.99% of the time but when they land on someone at just the right moment, it’s so easy to just go on autopilot and do the dumb thing.