I was looking at the list of illustration related projects at gnomefiles.org I saw Gestalter among them. Last time I tried to run this vector graphics tool was about a year and a half ago and it wasn’t a successful experience — the application crashed whenever I tried to draw anything.
Anyway, I wrote a letter to its developer, Philipp Klaus, to find out, whether Create’s Shared resources spec could be valid for his project. Philipp answered that everything that applies to Inkscape also applies to Gestalter plus vector patterns that are missing in Inkscape (not true, an object can be filled with clone tiles) and most likely will be available as separate SVG files in the future.
If you ask me, what features Gestalter has over other available opensource vector graphics editors, I will mention just one — masking. Even more, Philipp is working at gtkmm2 port (released versions are based on gtkmm1).
As Gestalter’s native file format is a subset of SVG (but renderers are different), I wonder how much effort it would cost to reuse masking code in Inkscape (yes, I’m a biased Inkscape freak
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Unfortunately I don’t know about any user community around Gestalter, but the application itself would be a nice addition to our project.