I have always been wondering whether the special "+" tab used to add other tabs (as in internet browsers) had a special name.
Also, is there any popular framework (Qt, wxWidgets, etc...) that has a built-in feature for that in its Notebook/TabWidget?
EDIT: Some asked why would such a feature exist while it's simple to implement it. Well, the answer is simple: every widely used feature deserve a dedicated component. It may be simple to implement in a classic tab widget, but it becames harder to do when we can move the tabs (this special one should always be the last) or when it's possible to close the tabs without having to have them selected (in some tab widgets, there's a cross to close the tab on every tab). Well, considering the different frameworks, it may be simpler or harder to implement. Hence this question to know whether the feature is standard enough to have a dedicated name and some "built-in" implementations in some frameworks :)