Xpages PagePeel Control is a special control that I created for the Xpages contest on OpenNTF.
You have probably seen these forms of advertisings where you can peel a corner of a website and see a message underneath. It seems most are flash driven, but I decided to try it out using some simple lines of jQuery. There is also a Dojo version of the control.
It depends on your environment, which version you want to use. If your application already includes jQuery, I suggest to use the jQuery custom control.