Based on Sir Clive Sinclair's last computer, the Z88. Everything's skinned, as you can see. Of course, only the main window is even remotely like the real thing...
Based on the classic Master System game. Who needs more than 8 bits anyway? Works with any combination of windowshade modes if they're in the usual order, and now includes MB, AVS, ML and video window.
A minimalist skin. This was very nearly a half-finished skin, but I forced myself to finish it off, and here it is. It'll probably look best on a light-coloured, plain desktop.