Download of AirSketch 1.0.8 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application relates to Design & Photo Tools. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This free software for Mac OS X was originally developed by Nebula.
From the developer:
AirSketch offers you a fast way to capture, annotate, and share screenshots and videos. Thanks to a streamlined interface, support for recording your screen, and an automatic web hosting option, you can try AirSketch for free to share anything with anyone.
You may want to check out more Mac applications, such as Vectorworks 2010 Viewer, DropImageURL or Polaris, which might be similar to AirSketch.