I've made plum jam, plum syrup and plum fruit leather. The fruit leather is quite easy to make. As I am getting older simplify is one of my favorite words.
Another neighbor gave me some concord grapes. I have never worked with these before. Since they have seeds in them I decided to cook and strain them then add sugar to thicken the juice as it cooks and try grape leather. My hands are now purple! I don't know if it's worth the mess.