actually it is one that is rather old but I am so used toit I hate to change and have tolearn another. It is LivePix. I don't know if it is still available but any photo editing software should be able to do these. I just don't like to change when I get used something. I put in the size I want to print in the custom size brackett slot. There are 20 to 25 photo sheets in these. They could go larger if wanted and they take a lot of ink.