XtreemFS is described as 'Object-based, distributed file system for wide area networks. The file system replicates objects for fault tolerance and caches metadata and data to improve performance over high-latency links. SSL and X' and is an app in the os & utilities category. There are more than 10 alternatives to XtreemFS for a variety of platforms, including Linux, Windows, Mac, Self-Hosted and BSD apps. The best XtreemFS alternative is DiskInternals Linux Reader, which is free. Other great apps like XtreemFS are Linux File Systems for Windows, Ceph, GlusterFS and Seaweed FS.
The only thing in common is that they are handling files, but reading a local filesystem is not a distributed file system with multiple servers.