A system includes a common display, a display computer to run collaboration software connected to the common display that drives the common display, the display computer being on a first network, a first mobile device to run a sharing application and a streaming application, the first mobile device being on a second network, separate from the first network, the streaming application to convert a display of the mobile device into stream data, a control channel between the mobile device and the display computer, and a stream channel between the display computer and the mobile device. The mobile device sends stream data directly to the display computer, wherein the display computer is to display the stream data on the common display. The stream channel may be directly between the mobile device and the display computer or may be over a relay server.