I am not sure, I always disable all toolbars at first time :/
Does not it looks like nassi schnederman plugin? I just tried it once, but did not really understand it's use.
To have the name: move the bar outside the panel, to make it floating, then you will see the toolbar's name. It should give you a hint, I guess.
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I confirm it is the nassi schnedermann (or something like that...) plugin. It seem it is used to create a model of execution path before programming, but, really, I am not sure...