Of all the options on the page, IPEVO Whiteboard is the one I have used the most. It has just the right amount of great features combined with intuitive simplicity to make it easy to use. Yesterday I wrote about using iPad Keynote as a remote control for laptop Keynote. DeMobo Slides does pretty much the same thing with Google Slides and Prezi. If you have a laptop or iPad and a projector, one of the above apps will probably meet your needs.
Apps for Presenting from your iPad
This week a reader commented on this post about my use of my iPad to lecture in my classroom. He asked what apps I was using to project to the class. Below is a picture of a handout I used to suggest some options to my colleagues: