An old standby.
1 (10-ounce) can pineapple chunks (about 1 cup), drained
1 (11-ounce) can mandarin oranges (about 1 cup), drained
1 medium apple, cored and chopped (about 1 cup)
1 cup grapes, halved
1/2 cup sour cream, light or regular
1/2 cup sweetened, shredded coconut
Combine the fruit in a large bowl, tossing well so the apple (and other fruit that likes to brown) can get coated in the pineapple and orange juice to prevent browning. Stir in the sour cream and coconut, gently tossing to coat. Refrigerate for at least 4 hours prior to serving to allow the flavors to meld together. Serve chilled.