Windows only: Sometimes you need to quickly hide specific windows on your desktop from prying eyes (e.g., eyes belonging to your boss). Window Hider makes the process quick and easy.
Window Hider hides any application using customizable shortcut keys. What makes Window Hider stand apart from similar applications, is the ability to assign each program—via a process list—a specific shortcut key, so you can quickly close all windows from a specific program or programs in a jiffy, not just the active one. You can also hide all programs in your list in one shot by moving the mouse to the hot corner (if enabled).
Adding windows to the process list is simple. Drag the icon in the add new process window over the active window and it fills in the process info—name and title—for you. Set up your shortcut keys via the settings option and you're done. Window Hider is a free download, Windows only.