SpiderOak - SpiderOak makes it possible for you to privately store, sync, share & access your data from everywhere.
Google Drive - Access and sync your files anywhere
Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.
Dropbox - Online Sync and File Sharing
CrashPlan - CrashPlan for Small Business backup software offers the best way to back up and store business & enterprise data securely - offsite, onsite & online in the Cloud.
Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.