Update 24.01.2016: KDE 5.5.3 (check the end of page)
KDE – desktop environment written in C++/Qt/QML and better for users which need more and love the powerful instruments. KDE can help you in everyday tasks like work with web, multimedia (photo, video, music), text and specific tasks: programming, video editing, education, games and many others. Many peoples say that KDE is very good for users with Windows experience, but I’m not sure. I highly recommend to try KDE: this desktop environment can give you many positive emotions.