I've been working hard all weekend on a re-write of ASCIIFlow.
It's time to move to Canvas, and that also means I've gotten rid of GWT (I still code JS like it is Java though!!).
I'm pretty happy with performance so far, and I've kept mobile support in from the beginning.
Would love to here any feedback, bugs (particularly on mobile).
Here is a demo with the basics: http://lewish.github.io/asciiflow2/root.html
Lot's left to do! Export, save, pinch-to-zoom, more tools and more performance.