FilePizza - Open source application used to transfer file via WebRTC and WebTorrent.
Carbon Copy Cloner - Carbon Copy Cloner (CCC) features an interface designed to make the cloning and backup procedure...
Bashupload - Upload files from command line to share between servers
Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.
transfer.sh - Easy file sharing from the command line
SpiderOak - SpiderOak makes it possible for you to privately store, sync, share & access your data from everywhere.