Clicky Gone - Clicky Gone allows you to hide your selected windows from view, this includes the taskbar button...
PinWin - Download PinWin - Pin On Top for free. Pin any window to be always on top of the screen. PinWin is a minimal Windows system tray application that allows you to pin any windows to the top of the screen with one click.
mapmywindows - A small program to show and hide windows in X window system.
DeskPins - DeskPins can be used to make any application topmost, that is, to keep it above all other windows.
TopMenu - TopMenu is a functionality clone of ...
Stay On Top - Set a window to stay on top with this single-function but handy application.