As my drawing tool for free model-drawing is OmniGraffle on the Mac (which, I might add is an extremely good and intelligent free model-drawing program). There are ArchiMate 2.0 stencils (to be found on GraffleTopia) but they have the layered-color setup. So, I created by own set of OmniGraffle stencils for ArchiMate 2.0.
I have changed the Grouping Relation. Mine behaves less intelligently graphically, but it can be filled with a color (which the other one can’t).
Maybe you can try it out?