Narrable is a nice site for creating a dynamic slideshow by adding audio to photos. This is done by uploading photos and either calling into Narrable to add a narration or uploading an audio file. A finished slideshow can then be embedded into a site/blog or shared via Facebook or email.
I recommend checking out Narrable by clicking here!!
For a more detailed review check out Richard Byrne's award winning blog.
For my Pinterest board on Presentations/Slideshows click here.