Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...
Acronis Cyber Protect Home Office - (Formerly Acronis True Image) Complete protection for your digital life
Dropbox - Online Sync and File Sharing
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.
Microsoft OneDrive - Secure access, sharing & file storage
Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.