I'm currently applying for a presentation designer for Facebook and Hitachi. Like all of us who are seeking examples, I searched the web. Hitachi has some really outdates styles so I went to Facebook. I had no idea that Facebook has their own software to create interactions that a user would when using their products---it's really cool!
with Origami Studio
I had no idea that this software existed. It was quite cool to see how it functions while you are prototyping.
Facebook also had a handful of assets you can use to create your digital mockups and prototypes. To get started in creating with these tools, view current examples on their site.
Playing with a few, my favorite are the zoom pop functionality and the messenger scroll function. I demo both of these examples on my presentation demo which can be downloaded below or by clicking on the demo graphic above.