dual monitor
Luna Display | Turning Your iPad Into A Second Monitor & A Cintiq-Like Device
Kishore Sawh
Once more, using the iPad to kill the Cintiq
DUET | The App That Turns Your iPad Into A Good Second Monitor
Kishore Sawh
It's inexpensive, it works on both Mac and Windows, and dead easy to use. If you want to boost productivity for cheap, this is a great option.
