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WikiPedia: Qt http://qt.nokia.com/ http://qt.nokia.com/products/licensing/licensing http://bits.blogs.nytimes.com/2010/02/16/that-smar... http://www.qtsoftware.com/qt-in-use http://www.zdnet.com/nokia-gives-qt-open-source-go... http://blog.qt.io/blog/2016/01/13/new-agreement-wi... http://blog.qt.io/blog/2017/06/07/renewed-qt-suppo... http://doc.qt.io/qt-5/licensing.html http://cutelyst.org/ https://www.youtube.com/watch?v=NbTEVbQLC8s