The STMicroelectronics LM337K is an adjustable negative voltage regulator. It provides a guaranteed output current of 1.5A and an adjustable output voltage down to -37V.
The STMicroelectronics L7915CT is a negative linear voltage regulator with a fixed -15V output voltage and a maximum output current of 1.5A. It is available in a TO-3 package.
The Texas Instruments LM317H is an adjustable positive linear voltage regulator. It offers a high output current capability and a wide output voltage range.