Prototypes

Prototypes is the best way to share, and test, your iPhone App mockups. Turn your still mockup images from Photoshop, Illustrator, Fireworks (anything!) into a tappable prototype that runs on iPhone and iPod Touch.

Testsite (mobile): Prototypes
Appstore (31,99 €): http://itunes.apple.com/de/app/prototypes/id430812258?mt=12&affId=1529572#
via: http://www.iphoneblog.de/2011/05/25/prototypes-test-tippen-auf-app-mockups/