Minecraft wiki entry for Fruit, associated text: Apple - A food that occasionally comes from oak or dark oak leaves.
Golden Apple - A rarer variant of apples that can be used for regeneration.
Slice - The food item that comes from melon blocks.
Sweet Berries - Found in berry bushes.
Cocoa Beans - Collected from Cocoa plants in the jungle.
Glow Berries - Grows on cave vines.