Origami is a free toolkit for Quartz Composer—created by the Facebook Design team—that makes interactive design prototyping easy and doesn’t require programming. (via Origami – Design prototyping with Quartz Composer )
Quartz Composer for iOS – Joris Kluivers This project intends to provide a rendering & interaction framework for .qtz on your iPhone or iPad. Similar to what the Quartz Composer framework provides on OS X.
Facebook Home prototyped in Quartz Composer – Tutorial Facebook Home is prototyped with Quartz Composer (by Facebook), @DaveOBrien_ (a design student from Ireland) reverse engineered it and made 5 tutorials explaining how it’s done!