Preheat oven to 375 degrees F. Line 18 muffin cups with paper bake cups; set aside. In a large bowl combine flour, baking soda, cinnamon, and salt. Stir in brown sugar. Stir in apples, carrots and raisins. In a medium bowl combine undrained pineapple, oil, eggs, and vanilla. Add pineapple mixture to flour mixture; stir just until moistened.