Design Tools for IxD

Pixate - http://www.pixate.com/education/demos/

I have an hypothesis that I drew after watching the Pinterest prototype - bounce effects are good for coming to the end of a list or other times when I'm directly manipulating something that reaches a boundary. Bounce effects for system movements are extraneous and get old fast. You're the system, you should know where the boundary is. Ease in there and be done already.

Project Comet - http://landing.adobe.com/en/na/products/creative-cloud/comet/229818-notifyme.html

Lots of Sketch in here, but I'm assuming there's PC support and the transition/IxD options are very empowering.