Remmina - Remmina is a remote desktop client written in GTK+, aiming to be useful for system administrators and travellers, who need to work with lots of remote computers in front of either large monitors or tiny netbooks.
Clonezilla - Clonezilla is a suite of software that's designed to allow you to back-up and image new hard drives with your data.
Xpra - multi-platform screen and application forwarding system
Macrium Reflect - Macrium Software - the creators of Macrium Reflect backup, imaging and cloning software.
X2Go - Get X2Go. Installing X2Go (client/server). Download X2Go Client (Windows installer (XP and Later), OS X 10. 9 and higher DMG, OS X 10. 10 and higher DMG or macOS 10.
AOMEI Backupper - AOMEI Backupper is a software created to help a person backup, restore, clone, and sync their entire Windows system.