DRBD - Distributed replicated storage system, implemented as a Linux kernel driver. (Source Code) GPL-2.0C
GlusterFS - Software-defined distributed storage that can scale to several petabytes, with interfaces for object, block and file storage. (Source Code) GPL-2.0/LGPL-3.0C
JuiceFS - Distributed POSIX file system built on top of Redis and S3. (Source Code) Apache-2.0Go
Kubo - Implementation of IPFS, a global, versioned, peer-to-peer filesystem that seeks to connect all computing devices with the same system of files. Apache-2.0/MITGo
OpenAFS - Distributed network file system with read-only replicas and multi-OS support. (Source Code) IPL-1.0C
Openstack Swift - A highly available, distributed, eventually consistent object/blob store. (Source Code) Apache-2.0Python
Perkeep - A set of open source formats, protocols, and software for modeling, storing, searching, sharing and synchronizing data (previously Camlistore). (Source Code) Apache-2.0C
TahoeLAFS - Secure, decentralized, fault-tolerant, peer-to-peer distributed data store and distributed file system. (Source Code) GPL-2.0Python
XtreemFS - Distributed, replicated and fault-tolerant file system for federated IT infrastructures.. (Source Code) BSD-3-ClauseJava