Download of DynamicSketch 2.1 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The program lies within Design & Photo Tools, more precisely Viewers & Editors. This software for Mac OS X was originally created by Astute Graphics Limited.
From the developer:
DynamicSketch is a plug-in that seamlessly integrates into Adobe Illustrator. This application gives you an improved intuitive control by taking the best elements of the native Pencil Tool, Shaper Tool, Join Tool, Paintbrush Tool, Width Tool, and Blob Brush Tool. DynamicSketch unifies them into a natural, easier drawing tool box.
You may want to check out more Mac applications, such as Cuadro or Resize Now, which might be similar to DynamicSketch.