Here is a really cool piece of software for making photo collages. There are quite a few options, and I was thinking of using it to make the background or part of the header that will be in my redesign of this site. You can save it in multiple formats, its really simple to make, you just drag your images into the software, and you can have it make it for you, or you can place the images yourself. You can shuffle them all around until you get it the way you like it best. Since this is the free version there is a watermark in the lower right corner, but its pretty affordable in my opinion, and they offer a discount for writing a review (hence this post).
I’m testing it right now, and here is the first college that I was able to make: