Picture Link is a super simple presentation app that lets you develop interactive mockups on your iPad regardless of what design program you are used to. Starting today, Picture Link offers a free version in the App Store. The basic idea is that you can link different slides with transparent hyperlink buttons. This makes it very easy to create clickable mockups in minutes. Demo video: http://www.zuhanden.de/apps/picturelink-app/ iTunes Link: http://itunes.apple.com/app/picture-link-lite-link-images/id403097042?mt=8 We would really appreciate your feedback!