Syncthing is an open source peer-to-peer file synchronisation tool.

Web-based operating system designed to be feature-rich, exceptionally fast, and highly extensible.

Access and share your files, calendars, contacts, mail and [more](https://apps.nextcloud.com/) from any device, on your terms.

File management and sharing system, supports multiple storage providers.

File hosting and sharing solution primary for teams and organizations.

All-in-one solution for saving, synchronizing, viewing, editing and sharing files, calendars, address books and more.

File Sharing and Collaboration Platform.

Unison is a file-synchronization tool for OSX, Unix, and Windows.

Minimalist JSON storage service with synchronisation and sharing abilities.

Secure and private space online where you can store, share and view your photos, videos, music and documents. Also includes a calendar, news feed, task lists, chat and email client.

Turn any web server into a powerful file management system and an alternative to mainstream cloud storage providers.

File storage, syncing, sharing, and collaboration with real-time editing, permission management, and desktop/CLI clients.

End-to-end encrypted cloud storage server. Files are encrypted and decrypted in the browser, so the server only ever holds ciphertext. Runs on SQLite or PostgreSQL, stores chunks on local disk or any S3-compatible service.

File sharing + sync, notes, and photos (alternative to Nextcloud and ownCloud's RSS reader).

Complete solution for your files with integration with Google and Office.

File synchronization between computers, servers, external drives.

Secure File Transfer Program.

Proprietary peer-to-peer file synchronisation tool.

Samba is the standard Windows interoperability suite of programs for Linux and Unix. It provides secure, stable and fast file and print services for all clients using the SMB/CIFS protocol.

Powerful file hosting script with support for Amazon S3, Wasabi, Backblaze, local, direct and SFTP storage.