BigHugeLabs has been around for years but is still a great tool to use for creating cool products out of your digital images.  There is no need to set up an account, but if you do, you will be able  to save your projects.  You can make lot of different item such as motivational posters, movie posters, trading cards, and magazine covers like the one I made here of my oldest son.  Lots of possible uses in the classroom.