simple canvas for Mac

From cf/x:

Simple Canvas allows you to paint annotations on a layer above your movie. The idea of this plug is that it allows you to place a virtual transparent canvas over your clip. You can paint on this canvas to your heart's content. enhance, annotate, and edit this canvas clip as you see fit. In contrast to our ?movie canvas? plug-in, this simpler version allows you only one canvas, and this canvas is applied to all frames.