Kizoa is a really neat, fun, and easy-to-use slideshow program. It is free- just go to the website and do the steps to set up your account.
Kizoa has a vast library of special effects, animations and music that can turn a so-so slideshow into something fun and engaging. Check out this Kizoa slideshow I did not long ago about Charleston's beautiful and historic Magnolia Cemetery, about which (plug alert!) I have written two books.