It is years I have not used Tk so I read some docs to refresh
my memory. I would indeed implement the "table" with a Tk::Canvas
and the cards with bitmaps items. You need to add
handlers to move the cards. I will probably send some some
code if I can get some juice from my brain cells.
I first thought using TopLevel windows for moved cards
and using Tk::wm overrideredirect to ask the window manager
not to decorate the said windows/cards, But this is more
complex and does probably work only on X-Window.
stefp -- check out TeXmacs