I found out about Shape Collage via Twitter (thanks klbeasley). It’s free with a downloadable and online version. I did try to embed my interactive collage here on this blog but it failed. : (
You will have to settle for the screencapture, but if you click it, it will take you to the almighty interactive URL. (The neat thing about it, is that each photo is clickable and the file is able to be imported into Photoshop where each photo will appear as a layer). A tutorial video is included below but it is really simple to use.