Composite — a new prototyping tool »

Hat tip to Mark Jardine on pointing to Composite — a new way to prototype apps. From their website:

Composite is a brand new way of creating interactive prototypes. It automatically connects to your Photoshop® documents and converts your mockups into interactive prototypes in seconds. No need to export images or maintain tons of hotspots.

While designing in Photoshop® you can also get a live preview of your design directly on your device, ensuring the design works in the right scale and context.

Looks very cool. If it works properly, $10 isn’t bad at all.