This looks pretty in a large, glass bowl.

1 large box blackberry gelatin
1 large can blueberry pie filling
2 cups hot water
1 large can crushed pineapple

Mix gelatin and hot water until dissolved. Add pie filling and pineapple. Chill until firm.

Topping
8 ounces cream cheese
1 cup pecans, chopped
1 cup sour cream
1/2 cup granulated or confectioners sugar
1 teaspoon vanilla extract

Mix all ingredients and spread on firm gelatin mixture. Keep refrigerated.