Check out http://www.photo-collage-software.com

I am happy with it to create stylish collages.

If anyone is interested in creating slide shows with animated effects,

i would suggest checking out a new program called Wondershare Flash Slideshow Builder (http://www.photo2vcd.com/flash-slide-show.html).

I've used it a lot specifically for Flash photo slideshows and it's extremely easy to use unlike regular Flash.

Good luck.