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