In medium bowl stir together bran, buttermilk and raisins, let soak for 10 minutes.
Spray muffin tins with non stick cooking spray, preheat oven to 350. In mixing bowl add splenda, molasses, applesauce, eggs and mix on low speed till well blended. Add buttermilk mixture and mix on medium speed for 1 minute.
Add flour, baking soda and salt and mix on low speed till incorporated. Increase speed to medium and mix for 3 minutes. Divide mixture into 12 muffin tins, bake for 15 - 20 minutes.