There are several products designed to help carry water away from the foundation. The first is a splash block which sits directly under your downspout elbow to help carry the water that extra couple of feet away from the house. The other product is a downspout extender which is generally four-feet long. If after using these products the water is still pooling under your downspouts, you probably need to check the grade of your foundation, which is how much the land slopes away from your house.