I had a very basic version of this running on the Mac a while ago. It could open Inkpad/SVG documents and all of the editing tools were usable, but I never got around to implementing the rest of the UI (inspectors, etc.) so it was pretty limited.

That's why a bunch of the code is organized in the Inkpad-Core directory, by the way. All of that stuff worked on the Mac too.

When I updated Inkpad for iOS 7, the Mac version stopped building and I haven't had a chance to investigate yet. Once I submit this version of Brushes, I'll take a look at it and if I can get it to build in a reasonable amount of time I'll put the code on GitHub.