Store securely encrypted backups on cloud storage services!
Duplicati is a free, open source, backup client that securely stores encrypted, incremental, compressed backups on cloud storage services and remote file servers. It works with:
Amazon Cloud Drive and S3, Backblaze (B2), Box, Dropbox, FTP, Google Cloud and Drive, HubiC, MEGA, Microsoft Azure and OneDrive, Rackspace Cloud Files, OpenStack Storage (Swift), Sia, SSH (SFTP), WebDAV, and more!
Duplicati is licensed under LGPL and available for Windows, OSX and Linux (.NET 4.5+ or Mono required).