Any apps/widgets for this?

Is there a desktop backgrounds 'viewer' that shows you your current desktop in a smaller frame on your screen somewhere?

I have some great desktops which cycle every half an hour, but of course they are hidden by what's on my desktop, windows/apps etc. So would love a little 'frame' (as in picture frame) that shows my current desktop. Obviously smaller but thought it would be a nice touch!

Anyone seen anything that does this?