"Pushpin" / Pin to foreground functionality in OSX?
I've seen some flavors of Unix that have a "Pushpin" button on every window. When this button is pushed in the window remains in the foreground even when the focus is switched to another application. This is very useful when you want to copy information from one app to another or want to leave one window open to use as a monitor while you work on something else. Is there some type of similar function in OSX?