That's a really nice idea !

Unfortunately (for me), only one of these has been ported to Python, and it uses GTK.

I'd really like to see a similar toolkit, but Qt-based (as this seems to be the way to the future), and with Python bindings...

As a side note, I'm trying to determine how some people do these UIs with buttons at the top and a list, table or tree beneath, and the buttons scroll up off the screen when the list/table/tree is scrolled down ? Like on the Evernote client main screen, that's neat and beats toolbars...

if anyone knows (especially in PyQt) I'm all ears :-)