I am looking for an inexpensive way to create a presentation style slideshow that I can play on a publicly viewed television at my company. I would like to see options for both Windows and Mac as I may go with a Mac mini computer. In Windows I can install the free powerpoint viewer to run a powerpoint slideshow but I am not familiar enough with Mac to know whether or not there is a free or inexpensive option. I will entertain all ideas so I don't need to stick with Powerpoint. My goal is to have a system setup that will display a slideshow that can easily be updated by remotely connecting and saving the new content on the computer without having to buy expensive software.