Git Annex

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.

File hosting and sharing solution primary for teams and organizations.

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

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.

Minimalist JSON storage service with synchronisation and sharing abilities.