Altia PhotoProto is a software add-on for Photoshop that converts graphics into interactive, user-driven prototypes with ease.

The process is simple and clear - all you need to do is to arrange and name your Photoshop graphics layers for buttons, screens, and other user interface objects. After complete layer organization, just hit the PhotoProto menu button, and the software will take over the rest. In a matter of seconds, you'll have a fully functional prototype available for distribution and testing.
One of the best parts of this software is that complex scripting languages are not required, making it an ideal solution for those who are not proficient in coding. Moreover, there are no new authoring environments required to learn, so transitioning into this software is a breeze.
If you want to learn more about the benefits of Altia's PhotoProto software and are interested in exploring other user interface development tools, be sure to visit their website to gain valuable insights.
Version 1.05: 2000% speed improvement; Mac support for 3D Models; Warning/Error Summary; Decks work when embedded in Layer Sets; Vista and CS3 Support
Version 1.04.20: Toggle Buttons; Push/Hold Buttons; Support for Video and Web Cams on Macs; Bug Fixes