PowerPoint is one of the most commonly used tools to create beautiful presentations for people who are seeking the simplicity and ease in the matter. But it prevents that there are other alternative services far of Microsoft tools which have also proved a good performance. If you want to try a few i thought to mention the more known below:
1° animoto: This is a service that allows you to create Videos of presentations from a set of images that are to submit. It has paid versions and a free.
2° show zoho: Another service of creation of presentations by adding our photos and organize them into slides while offering several other advantages in the exploitation of our presentations grace to remote service.
3° slideshare: It is a kind of network for the amateurs of presentations. We can easily create a presentation and share it online with which we want, but also invite the other to the view.
4° photomotr: A nice application for creating presentations with images collected from the Facebook network. It is a better way to give life to our shared photos on Facebook.