software right?
ok samplers:
vsampler vsti (can be processor heavy at times + dodgy programming but its the best sampler out there if you ask me)
battery (drum sampler originally so its interface is a bit simpler)
HALion (heard alot about it, never used it)
drummachines:
erm drummachine software is sort of obsolete these days but ill tell you the ones i can think of right now
vsampler (standalone vsti with sequencer haha)
battery (also standalone + seq.)
fruityloops3 (its a drummachine you know)
and hammerhead (!)