I saw that BlueSpice presentation also (remotely). You don't actually mean "icons", I think - you mean "special syntax" or something. i.e., with the Checklists extension, if you add "[]" at the beginning of a line, it's displayed as a clickable checkbox. I think for all of those extensions, they have VisualEditor integration. I assume that means that it would work as well within a VEForAll-enabled textarea, but I have no idea.
I also saw that other presentation I think you're talking about, of the not-yet-released extension from ArchiXL currently called either "Semantic Comments" or "SmartComments". That extension, though, takes effect when viewing a page, not editing it, so VE/VEForAll should not be relevant. (I also think the InlineComments extension is the better tool for this - and it's already available - but that's a whole other story.)