Serverspace.io - Serverspace offers automated, simple, and affordable cloud infrastructure to everyone. Get started building your cool digital stuff right now.
Déjà Dup - Déjà Dup is a simple backup tool.
Pika Backup - Pika Backup is designed to save your personal data and does not support complete system recovery. Pika Backup is powered by the well-tested BorgBackup software.
rsync - rsync is a file transfer program for Unix systems. rsync uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync.
Borg Backup - Deduplicating backup program with compression and authenticated encryption
Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.