, Sr. Member
There’s no “magic bullet” or framework i’m aware of to achieve this.
The page itself is a simple plain that can easily be manipulated (i.e. rotated around z axis) in code. Taking a very close look at Ecodazoo, I would guess he builds the model and uses a modifier routine, just like bend or twist, but one that “folds” the vertices flat. I’d always thought the models where also made of “paper”, but closer inspection reveals they are solid.
The thing I would struggle with is the actual graphic design, which is truly wonderful and together with the slick transitions, make this project a Flash classic.
I’m sure I could program this effect for you if you need it for a commercial project.
Good Luck!