Picture Collage Maker
A newer version of Picture Collage Maker is available.Or, Learn More About Picture Collage Maker
Full user review
"It makes beautiful collages, and does it well"
It has lots of options and templates, or you can just design a plain collage with various sized pictures.
It takes a little time to familiarize yourself with all the options, but it's worth the effort.
I created several collages with this program and they all came out looking great!