Sliderocket app offers users several features such as : show presentations , share presentations any time they want, invite someone to view a presentation using a simple link, download presentations for offline playing,and show YouTube or embedded videos directly from slides.
2- Idea Flight
3- Slideshark
This is a great free app for showing and sharing presentations on the iPad. It also provides analytics to your presentations.
4- Xavier Presentation
This is an app used for advanced interactive presentations shown on multiple iPad devices.
5- SlideGrabber
This iOS app offers users the ability to : take photos of the slides with auto-cropping, take notes directly from slides, organize slides by presentations, and email slide image or save it to the photo library.
6- Prezi Viewer
This is the official app of the popular Prezi. You can use it to view and present your prezis with simple, intuitive multitouch gestures.