Is there WindowTabs like app on Mac OS X? On Windows, I love to use an app called WindowsTabs. 


  WindowTabs runs in the background and attaches a tab to each of your application windows. Drag one tab onto another and create a tabbed group. By organizing your windows into logically related groups, you can more easily manage a large number of open windows.


I searched google for Mac equivalent, but got nothing so far.

Does anyone know a similar app?
StickyWindows creates a tab for every window that sits on the desktop. Its not exactly what WindowsTabs do but it is something ;)
It seems to only work with Leopard though :(