I use Block fab, Quilt calc and Quiltography. I have used Quiltography the most recently. I am making a quilt for my grandson, graduating from high school and could show him pics with my fabric. I wanted his color likes and patterns. He has chosen Storm at Sea in red and yellow. I wasn't to surprised at the pattern. He liked the optical illusion. But I sure am glad I asked about the colors. I never expected red and yellow.