Air Sketch for iPad is no ordinary sketch app!
Provided you’re in the same wireless network, you can sketch on the iPad, starting from a PDF document or an image on the iPad, you can watch the same PDF document and sketching in real-time on several PCs or Macs.
All you need is an HTML5 browser (just like Safari, Firefox, Chrome and all the latest crop) and point to the iPad address plus the IP port you can change on the iPad.
Air Sketch is great for presentations in the boardroom, classroom, or …