I'm surprised no one has mentioned [LabView](http://en.wikipedia.org/wiki/LabVIEW http://en.wikipedia.org/wiki/LabVIEW), a visual programming environment used b

I'm surprised no one has mentioned [LabView](http://en.wikipedia.org/wiki/LabVIEW http://en.wikipedia.org/wiki/LabVIEW), a visual programming environment used by many scientists to control data acquisition systems. Although the "language" makes creation of functional user interfaces fairly simple, I find the system quite unwieldy as soon as program complexity increases to even a moderate amount.