Battery by Native Instruments is a drum sampler with focus on electronic and hip-hop music. Use the 140 built-in kits or add your own samples. Edit start/stop of sample, volume curves, time stretching and more.
Superior Drummer from Toontrack is a very advanced drum production studio that allows for complete control of the drum sound. Extra drum kits and MIDI grooves are available from Toontrack and 3rd. party.