GarageHQ - Geo-distributed, S3‑compatible storage service that can fulfill many needs. (Source Code) AGPL-3.0Docker/Rust
Minio - Object storage server compatible with Amazon S3 APIs. (Source Code) AGPL-3.0Go/Docker/K8S
SeaweedFS - SeaweedFS is an open source distributed file system supporting WebDAV, S3 API, FUSE mount, HDFS, etc, optimized for lots of small files, and easy to add capacity. Apache-2.0Go
SFTPGo - Flexible, fully featured and highly configurable SFTP server with optional FTP/S and WebDAV support. AGPL-3.0Go/deb/Docker
Zenko CloudServer - Zenko CloudServer, an open-source implementation of a server handling the Amazon S3 protocol. (Source Code) Apache-2.0Docker/Nodejs
ZOT OCI Registry - A production-ready vendor-neutral OCI-native container image registry. (Demo, Source Code) Apache-2.0Go/Docker