Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.
Google Drive - Access and sync your files anywhere
Cobian Backup - Cobian Backup is listed among those backup management systems that in addition to providing the platform for making the backup, contains the system of auto updating of the backup of the data.
Mega - Secure File Storage and collaboration
SpiderOak - SpiderOak makes it possible for you to privately store, sync, share & access your data from everywhere.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.