VNC stands for Virtual Network Computing. It is remote control software which allows you to view and interact with one computer (the "server") using a simple program (the "viewer") on another computer anywhere on the Internet. The two computers don't even have to be the same type, so for example you can use VNC to view an office Linux machine on your Windows PC at home. VNC is freely and publicly available and is in widespread active use by millions throughout industry, academia and privately.
How to set up:
1) Set up your password
2) Type your password and confirm it
3) Type your remote IP address.
4) Now type the remote PC password
Download: Real VNC 4.1.2
Source & Image:
Peopleware, RealVNC