New answers tagged tools
Not entirely sure what you mean by 'editable' as that could mean a number of things. But one option is possibly Axure. I'm not the biggest fan of it in the world, but I am finding that it does excel at a few things. The workflow for using Axure would be as such: scan or take photo of your paper sketch open the file in your favorite image viewing/editing ...
POP App looks pretty good if you have an iOS device handy: http://popapp.in/
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