Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.
Paubox - Paubox provides HIPAA compliant email encryption without the hassle of extra steps.
Soonr - Soonr is a cloud-based document storing and file sharing system for the small and medium-size businesses.
Symantec Data Loss Prevention - Fully protect your data with the comprehensive detection technologies and unified policies of Symantec's industry leading Data Loss Prevention (DLP).
Nubo - A self-hosted file sharing application in Haskell.
Microsoft BitLocker - BitLocker is a full disk encryption feature included with Windows Vista and later.