LibreOffice is already my default office suite in Ubuntu though there is not much of a difference between OpenOffice and LibreOffice for now. But things are moving fast and LibreOffice is going to have its first official release soon. Meanwhile, you might want to remove all traces of OpenOffice and install LibreOffice in Ubuntu for a change. Trust me, it feels good.
Just days ago, we featured here one of the best collection of Ubuntu Unity mockups created by users and fans. Now, here are a bunch of non official LibreOffice mockups you might find really interesting. All of them are the creative works of deviantart user pauloup. Big thanks to him!
According to the author, all of the LibreOffice mockups above are made using open source tools such as Inkscape and Gimp. And the GTK2 theme used was the beautiful Atolm Theme by SkiesOfAzel. Many thanks to reddit for the information.