Stats - Simple macOS system monitor in your menu bar.
Acronis Cyber Protect Home Office - (Formerly Acronis True Image) Complete protection for your digital life
iStat Menus - "An advanced Mac system monitor for your menubar."
Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.
MenuMeters for El Capitan - MenuMeters for OS X El Capitan 10.11 (and later)
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.