AppMobi actually used Ejecta[1] for their Canvas2D rendering on iOS - which it seems also made its way into the Intel XDK[2]. I believe they have their own implementation for Canvas2D on Android, but sadly, it's all closed source.

I should really get a cross-platform effort for Ejecta going. We have CocoonJS and Intel's XDK, but afaik there's no Open Source alternative right now.

[1] http://impactjs.com/ejecta

[2] http://www.html5dev-software.intel.com/amdocs/readmes/ios.ap...