Kinto

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.

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

File Sharing and Collaboration Platform.

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