VNC

VNC server in ubuntu

Dash => Desktop Sharing

VNC client in ubuntu

Dash => Remote Desktop Client

VNC client in Windows

chrome => plugin => VNC® Viewer for Google Chrome

The authentication mechanism requested cannot be provided by the computer. VNC Viewer also fails with an error about encryption level.

http://askubuntu.com/questions/477947/what-do-i-need-for-remotely-accessing-my-ubuntu-14-04-desktop