Adobe Illustrator → HTML5 Canvas. Free.
visitmix.com
visitmix.com
> The purpose of Ai->Canvas is to accelerate your HTML5 canvas development.
I can see this being useful for, for example, <canvas> game development where you don't want to code all the graphics by hand.
(FYI: the mac version of the plugin has been working just fine for me so far, but I was always under the impression that adobe plugins like this were cross-platform. Isn't it kinda odd that MS separated them out?)
I'll dig into it tomorrow when I have a laptop to use.
However if you add animation to it you'll have the usual excanvas problems (slower framerate over time)