I guess you probably collected a lot of beautiful pictures in your computer, but in disorder. Most often, they just lie there quietly. To make utilize waste materials, if we could combine the pictures on the shelf into a lively movie, that will mean different a lot.
As one software specially designed for creating and running presentations for church and such kinds of application occasions, MediaShout is user-friendly (just drag & drop script creation) and powerful enough.
3D-Wall is a user-friendly free 3D photo navigation (wall-style) app made by Polar Vision from ShangHai. It's specially designed to help users to create 3D wallpapers/photos wall for exhibition or personal slideshow.
Smilebox is a free webware application (supports PC & Mac) which allows to create interactive photograph albums, slideshows, or to make electronic greeting cards and postcards for the special holidays, compared with many other photos sharing website it is more offbeat.