UnFREEz. This is currently a very useful freeware application. It may not be as well laid out or as easy to use as other paid animators but it's free! The program will take any amount of .GIF images (they have to be saved as .GIF first as it does not convert other image types into .GIF) and it animates them at how ever many frames per a second you choose. The animation can then be saved if you like it.