RealVNC

VNC enables you to remotely access and control your computers from another computer or mobile device, wherever you are in the world. It is used by individuals and by organizations across every industry sector for a range of different use cases, including providing IT desktop support to colleagues and friends, and accessing systems and services on the move.

You deploy VNC to a computer you want to control, VNC Viewer to the device you want to control from, and connect the two.