The topic of this paper is Window Manager (WM) of Operating System (OS). These tools have not evolve since along time. Most of them are already based on WIMP paradigm and only few methods have been proposed to deal with Post-WIMP. Mobile devices or game devices have proposed some solutions to interact with gestures. For example on game console, Wii is developed around the Wiimote: this device is designed around two kinds of sensors: a video camera and accelerometers. More recently, Microsoft has developed an unique video camera to interact with their console: the Kinect. In this paper, we are presenting our approach to redesign a window manager, based on Kinect from Microsoft. We use this camera to analyze what happen behind the screen, the goal of this approach is to develop a WM for large screen display. Our WM is designed to identify person, then analyze some gestures to interact with window. Some development of this approach have been realize to mange several user on the same computer. Two methods of window tiling are proposed both are based on location of user in space. Finally, our solution supports all off-the-shell applications (based on standard mouse interaction) but also Post-WIMP applications using TUIO.