I did the above collage at a website called Photovisi. It was really easy to put together and only took a few minutes to do. While I was there I noticed that there is a place to register/log in but I was able to make this without registering on the site.
I can't recall how I came across this site, most likely it was through one of you. Sorry for my poor memory. There's another site I found rather fun that I'll share with you later in the week.