I have made cheesecakes regular, pumpkin, and chocolate arranged on a tray. You could do brownies cookies and as mentioned above cream puffs or cake balls. I have made mini pumpkin pies with a ginger snap cookie on the bottom.
Mini triffles in a cup. Cut brownies or chocolate cakes into bite size pieces arrange on bottom of a clear cup. Top with choc, vanilla, or whatever flavor pudding you would like, Top that with toffee bits chocolate chips, and finally cool whip or whip topping. Garnish with brownie/cake crumbs or a pirouette cookie. Another fave is vanilla cake, topped with strawberries, vanilla pudding and whipped topping. A big hit with the kids are dirt pudding cups. The possibilites are endless with cake, pudding and topping flavors. These are always a big hit and very easy.