Omnigraffle for iPad, or I really wanted to like you (More Than This - Joshua Seiden's Blog)
Picture Link is a super simple presentation app that lets you develop interactive mockups on your iPad regardless of what presentation 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!
Associated Apps: Picture Link
I just released Live Wires - Prototyping for iPad. Its a no nonsense way to wireframe and refine app ideas in order to create usable interfaces. Supports scrollable view panes to explore screen overflow regions. www.livewiresapp.com
Associated Apps: Live Wires - Prototyping
amir
Keynote is great for prototyping. I use the desktop version to create prototypes that I can test on the iPad (http://bit.ly/bCA8W3)