Mac users frequently extoll the benefits of a second display for increasing productivity. Unfortunately, LCD monitors are costly, and can leave you tangled up in cables. AirDisplay 1.0.1 presents a good solution – it extends Mac desktops wirelessly by an extra 1024 x 768 pixels, and can transform an iPad into a secondary small monitor. It also enables you to use the touch screen of your iPad for a control surface. At only $10, this can increase mobile office or home capabilities for travelling executives, creative types or home users.