BitTorrent Sync

[Delles]

https://www.getsync.com/

Truly Private.

Your information is never stored on servers in the cloud.
Your files and personal identity are only stored locally on the devices you authorize, never in the cloud. Your identity can never be correlated to the data you share with Sync.

No accounts. No passwords. No cloud vulnerability.
Cloud services are attractive to hackers because user account information is centralized. Sync uses distributed cryptographic security so there is no central target for attacks.