Clicky Gone - Clicky Gone allows you to hide your selected windows from view, this includes the taskbar button...
DeskPins - DeskPins can be used to make any application topmost, that is, to keep it above all other windows.
mapmywindows - A small program to show and hide windows in X window system.
Skybn Window On Top - Window on Top can be used to make any application topmost,that is to keep it above all other windows.
TopMenu - TopMenu is a functionality clone of ...
WindowTop - Easly set any window on top, just move the mouse to the top area of the window.