Have you heard of Air Display? For those who haven’t, Air Display is an app for the iPad that when paired with another Mac or MacBook, turns it into a secondary display. So if you have videos you want to watch but don’t want to keep alt-tabbing, then Air Display is one way to go about getting a secondary display on the cheap, assuming you have an iPad to begin with.
That being said, the developers of Air Display, Avatron Software, have recently announced a new called called Air Stylus. What it does is that it will turn your iPad into a pressure sensitive wireless surface in which you can draw on, with the drawings being mimicked onto your Mac. Air Stylus will be compatible with over 30 drawing programs available on the Mac, and will also play nicely with a bunch of pressure sensitive stylus peripherals.
This includes the Wacom Intuos Creative Stylus and the Adonit Jot Touch 4. The stylus will also support gestures like pinch-to-zoom and will also be smart enough to reject your palm while drawing, so you can rest your palm on the surface of your iPad while you draw. Unfortunately the app does not come cheap and will cost you $19.99, however if you already own an iPad want would like to try drawing with it instead of buying a drawing tablet, it could prove to be a cheaper option.