I am using Snow Leopard 10.6 and every desktop manager that I can find and install won't work. What can I try or apps that you know that I can try that will work on 10.6?
I did a google search for "3D cube desktop manager" and I found this, which seems to me to be a Windows desktop manager which tries to emulate the latest Mac OS X features. So what you're looking for is already baked into Mac OS X.
Or am I missing something?