The demos can be downloaded by clicking on one of the three OS4, MacOS and Windows logos, on the right side of the Cope-Com logo.
Thanks Varthall, it seems you have to turn image loading on for these to appear. Suggestion to webmaster: why not make all the links accessible for bandwith-impaired users (as is done on my own site)? There is not even any hint anywhere that there are extra links for graphics-enabled users...