Knox - Knox offers easy disk image encryption and comes with a built-in backup service.
ShareFile - Secure file sharing and sync
Kruptos - Lock and encrypt your photos, movies, files and folders using 256-bit file encryption.
Google Drive - Access and sync your files anywhere
Advanced File Security Basic - Download Advanced File Security Basic. Protect files by encrypting them with a strong password, a series of questions, or even an USB key you can carry around with this powerful security solution
Dropbox - Online Sync and File Sharing