The pictures below feature some screenshots from the STAR online monitoring.
The histogram presenter’s GUI
(QEvpClient) is written in Qt. The histogram server’s GUI (evpServer), visible only in expert mode,  is written in plain ROOT (will eventually change to Qt too, but I am too lazy to do it now).
Screenshots
presenter.png
presenter_1.png
presenter_2.png
presenter_3.png
evpServer_1.png