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Raspberries (and blackberries and all those similar) have a short shelf life which is why you rarely see them sold in stores. They might last a day or two but go bad fast (even with refrigeration.) Blueberries also go bad quickly but can last a bit longer. Yes, refrigerate them, but don't wait too long to eat.
If the pineapple is canned and unopened, it doesn't need to be refrigerated. If it is canned and opened, pour it into a container with a lid and refrigerate it. If it is a fresh pineapple, you won't need to refrigerate it until it's a few days old and getting a little too ripe. Cut the pineapple from the core and store it in the fridge in a covered container.