Even though you can create effective PowerPoint presentations with ease and do some cool things with Keynote, these apps are passé (not to mention relatively expensive), and it’s time to try something new. Fortunately, you have a number of great options!
Here’s a roundup of 4 of the best PowerPoint and Keynote alternatives.
http://www.makeuseof.com/tag/presentations-evolved-4-alternatives-powerpoint-keynote-compared/