If you are looking for a free software to Stack up all your photos, then you might use the free collage maker software, which I often use.
Stacking your photos may not be a day to day process, but at times you might need to do it. Using this collage maker software you can pile up all your photos at one place or you can combine more than one photos and keep them as a single photo.
A very good solution if you are running out of space on your crumpling hard drive.
The software I’m talking about is Picasa. One of the best products of Google and it’s free.
[ Download Picasa ]