A lot of open source software has started by blatantly copying the design or concepts of a commercial product, but then they have later diverged from the original source of inspiration to have a few original ideas of their own. A couple of examples: OpenOffice, RhythmBox, Freeciv.
really? You think so?
I am glad that there is an open source option, but I hate the fact that its all most 95% copy paste job of SO.
There is a difference between design inspired from something and blatant copying something.