SeaweedFS is a fast distributed storage system for blobs, objects, files, and data lake, for billions of files! Blob store has O(1) disk seek, cloud tiering. Filer supports Cloud Drive, cross-DC active-active replication, Kubernetes, POSIX FUSE mount, S3 API, S3 Gateway, Hadoop, WebDAV, encryption, Erasure Coding.

Ceph is a distributed object, block, and file storage platform

FUSE extends macOS by adding support for user space file systems

FUSE-based file system backed by Amazon S3

Windows File System Proxy - FUSE for Windows

Upspin: A framework for naming everyone's everything.

FUSE filesystem over Google Drive

User mode file system library for windows with FUSE Wrapper

a high-performance, POSIX-ish Amazon S3 file system written in Go

cloud-native file store

A simple, high-throughput file client for mounting an Amazon S3 bucket as a local file system.

a featureful union filesystem

A bittorrent filesystem based on FUSE.

Encrypted overlay filesystem written in Go

a FUSE file system based on Google Drive

FUSE bindings for Go

Cryptographic filesystem for the cloud

A fast high compression read-only file system for Linux, Windows and macOS

A native Linux filesystem for Microsoft OneDrive

Plexdrive mounts your Google Drive FUSE filesystem (optimized for media playback)